1 / 6

Julianne Hough's 25th Birthday Party

Julianne Hough's 25th Birthday Party
Julianne Hough threw a big bash in Los Angeles on July 20 to celebrate her 25th birthday in style. The theme was "The Great Gatsby" and all the celebs in attendance got into the Roaring '20s spirit, including Lily Collins and Selena Gomez, who puckered up with the birthday girl for this photo op. Gomez captioned the pic, "And all that jazz." But did Hough realize she was getting photobomed at her own birthday bash? At first glance, this may just look like a beautiful selfie of Lily, Selena, and Julianna at the party, but we're not sure they knew there was another reveler in the mix when Gomez posted it! (7/20/13)

Julianne Hough's Gatsby Birthday

Julianne Hough threw a "Great Gatsby" themed birthday party in Hollywood

on July 20, 2013. The former "Dancing With the Stars" pro rang in her

25th year with tons of celeb friends!