Chelsea Handler's show Chelsea Lately came to a close on Tuesday night, and, of course, the funny lady made sure that her last night was a memorable one. Chelsea got a lot of help from her many A-list friends, including a special intervention from Jennifer Aniston, Mary McCormack and Sandra Bullock to address her party-girl ways. Of course, they weren't the only star guests, as Chelsea was joined by a massive group of celebrities at the end of the show for a hilarious sing-along. Watch Sandra, Jen and Mary's intervention above, and check out the surprise musical number below.
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