It's hard to believe that "Stay" singer Rihanna turned 25 yesterday. Born and raised in Barbados, she appeared on our radar just over seven years ago and since then has become renowned for switching up her beauty look on an almost weekly basis. From a sleek '50s-rockabilly style up do, to a choppy pixie cut and beyond, this new MAC collaborator has no qualms about changing her look drastically. Hairstylist Ursula Stephen says that Rihanna's 'do "typically changes depending on what’s on our agenda, what she’s wearing, or how she’s feeling." To celebrate her birthday, we're taking a trip down memory lane to scope her best hairstyles — we've picked 30 — from over the years.

Whether you're heading out tomorrow night for a romantic dinner for two, or you're hitting the town with your girlfriends to celebrate Valentine's Day, it's the perfect time to paint the town red — with lipstick, that is. It's an easy way to vamp up your regular makeup routine, and the fool-proof finishing touch for a special night out. With that in mind, we've found five of the best red lipsticks, suited to all budgets, but don't forget that it's one look that requires a little maintenance — make sure you reapply throughout the night!

Nail strips are a simple way to spice up your beauty look and if you're somebody who is strapped for time — and cash — then they're definitely something you should get to grips with. While many designs mimic the trends of the season, from high-shine metallics to the half-moon mani, there are also block colours and prints available, as well special holiday season designs. With a quick and easy application process, they're fast becoming a must-have in our nail kit.

There was no shortage of standout celebrity beauty looks this week, with both models and actresses providing plenty of hair and makeup styles for us to recreate. For a low-maintenance look, try Jess Hart's barely-there makeup and soft, loose waves from the Ferragamo Signorina fragrance launch, or for something a little more colourful, check out Helena Christensen and Solange Knowles' standout lip looks. Click through to see who else topped this week's list.

It was all about beauty prep this week with Doutzen Kroes, Chrissy Teigen and Ricki-Lee Coulter all posting pics from backstage snaps from their respective shoots. We also spotted Victoria's Secret Angel Candice Swanepoel showing off her perfect winged liner and there were nail shots a-plenty. Click through to see more of this week's best beauty snaps via Twitter.

Last night Jess Hart, Emma Roberts and Kate Mara joined Bianca Balti to celebrate the launch of Ferragamo's new fragrance, Signorina, which Bianca is the face of. It's not the first time the Italian beauty has fronted a perfume campaign — the 28-year-old is also the face of Karl Lagerfeld's Karleidoscope. The model revealed that the scent is "pretty and clean". Click through to see Bianca and her fellow Ferragamo-clad friends dressed in brights at the event.

Since strong brows are having a resurgence this season, there's never been a better time for you to step up your eyebrow maintenance routine, especially in between waxing and/or shaping appointments. On a day-to-day level, artfully shading and filling in any patchy areas should be right up there on your beauty to-do list, as should carefully weeding any errant hairs. Perfect for the on-the-go-gal, these tidy brow kits will have you looking runway ready in no time.

With an array of celebrity beauty looks spotted both on and off the red carpet this week, we've been able to add a few new hair and makeup styles to our repertoire for days ahead and our next night out. Natalia Vodianova and Michelle Williams have provided us with two new lip looks to try, a soft pink and high-shine red respectively, while Miranda Kerr's off-duty beauty style out and about in NYC has made us crave sleek, glossy locks. Click through to see who else made this week's top 5.

Our favourite Twitter celebs shared their latest beauty looks via TwitPics this week, including Kim Kardashian, who donned a blonde wig, and Teen Vogue's Eva Chen shared snaps from the stylist chair before adding peek-a-boo violet locks! We also spotted stellar nail art, including Ricki-Lee Coulter's on-trend metallic gold mani and Alexa Chung's bright blue eyes. Want more of the best beauty snaps this week? First you have to Like us on Facebook and follow us on Twitter. Then, walk right this way . . .

We're back on the trendspotting bandwagon today, with a focus on the standout bold brows that dominated the international runways. At Topshop Unique the brows were thick and brushed upwards while backstage at Burberry, they were artfully manicured and maintained. And while we might skip the bejwelled brows at Chanel for every day, Alexander Wang and Marc by Marc Jacobs offered up strong and classic variations, staying true to the motto that brows frame the face. Click through to see more of this runway trend — proof that bold brows are here to stay.

The Hunger Games has hit London, with the film's stars hitting the red carpet for the premiere yesterday. Jennifer Lawrence donned another shimmering golden gown, this time leaving the smoky eye at home. Instead, the 21-year-old actress opted for a slick of black liner along her upper lashline and a wash of gold eyeshadow, her hair tied back in a loose ponytail complete with a choppy fringe. Co-star Elizabeth Banks switched up her sleek bob for short, tousled waves and a bronzed complexion complete with lashings of mascara. See the rest of the looks.

BB (also called blemish balm) cream was originally formulated by cosmetician Dr. Christine Schrammek in Germany back in the late 1960s, used as a soothing and healing product for patients who had undergone a laser or peel treatments. Fast-forward 20 years and the craze hit Japan and Korea, where women accredited the cult cream as the answer to their flawless complexions. Now available on Australian shores, it's an all-encompassing, must-have beauty buy — it evens skin tone, contains UV protection, conceals imperfections and prevents acne.

From the premiere of Game Change to the front row and the celeb-studded Louis Vuitton — Marc Jacobs: The Exhibition event in Paris, stars like Julianne Moore, Sarah Jessica Parker and Emily Blunt were our go-to girls for beauty inspiration this week. On the hunt for a new fuchsia lipstick à la Julianne, or the product to recreate Ms. Blunt's perfect winged eye? Walk right this way . . .

With 2012 A/W Paris Fashion Week drawing a celeb-studded crowd to the front row at some of the biggest runway shows, our Twitter feed went into overdrive,  providing us with glimpse at backstage beauty at Chanel, complete with bejewelled brows, and at Stella McCartney with Karlie Kloss and Pat McGrath. Elsewhere Ricki-Lee tweeted her hair colouring session, Kim Kardashian showed off her baby doll beauty look and — our personal favourite — little Honor Warren (a.k.a Jessica Alba's daughter) sported orange nails complete with chartreuse polkadots. Want more? Click through to see this week's best beauty TwitPics!