Cameron Diaz & Benji Madden Couple Up for Jessica Alba's Star-Studded Birthday Party

Cameron Diaz and Benji Madden stepped out together in honor of good friend Jessica Alba‘s 36th birthday!

The 44-year-old actress and the 38-year-old Good Charlotte lead guitarist matched in all-black outfits as they headed into Delilah for dinner on Friday night (April 28) in Los Angeles.

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Other guests included Jessica‘s hubby Cash Warren, Jaime King, Kelly Rowland, Shay Mitchell, will.i.am, and Russell Simmons. Beyonce reportedly made an appearance as well. (See more pics here.)

After dinner, the group partied it up at the Peppermint Club, where the theme was Prince and Michael Jackson!