Katharine McPhee Bridesmaid Pictures

Katharine McPhee was a bridesmaid over the weekend when her sister got married! Decked out in a pale pink gown, Katharine helped her sibling Adrianna walk down the aisle at a sweet ceremony in LA. Katharine was excited about the ceremony and tweeted, "Today is the big day . . . Wedding bells are ringing!" Katharine's one of many stars with maid of honor roles — check out our roundup of celebrity bridesmaids! Katharine has had the honor of walking down the aisle herself. In 2008, the then 23-year-old married Nick Cokas, who's 19 years her senior. The last year has brought big changes for Katharine thanks to her role on NBC's Smash, which has been renewed for a second season.