"Gossip Girl" star Chace Crawford may have just broken up with country singer Carrie Underwood, but that didn't keep him from eyeing the beauty queens at the Miss USA pageant in Las Vegas. He especially couldn't keep his eyes off one contestant: Miss Missouri, who of course happens to be his sister Candice Crawford.

Chace was at the pageant to lend support to his 21-year-old sister, who fell short in her bid to win the Miss USA title but did end up in the Top 10.

While the rest of Chace's family wore oversize buttons in support of Candice, Chace was supportive in a more vocal way. When they announced his sister was in the Top 10, Chace stood up, threw his arms in the air and shouted in celebration.

Prior to the pageant beginning, a line of girls formed near Chace in hopes of getting autographs and pictures. Other celebrities at the event included judges Joey Fatone, Heather Mills (who was booed by the crowd upon her introduction) and "Project Runway" winner Christian Siriano.

Despite the endorsement from her famous brother, Candice Crawford did not win the pageant. That honor went to Miss Texas Crystle Stewart.