Cue the chiffon! Even celebs lend their help to pals and siblings when it comes to their big day. Take a look at these A-listers who served as bridesmaids in the past. Everyone from Jessica Simpson to Britney Spears have taken on the role.
Not your average bridesmaid! Lady Gaga—and her hair—offered her help at best friend Bo O'Connor's wedding in Cabo San Lucas, Mexico, in July 2011.