Good-bye short hair! 

Selena Gomez celebrated wrapping up her part in Spring Breakers with a hair makeover.

After stepping out on the orange carpet at the Kids' Choice Awards in L.A. Saturday with her shoulder-grazing haircut, Gomez, 19, went straight to her hair pro for a lengthier look.

"Spring Breakers is done now hair's done for the next movie!" she posted to her Instagram account Sunday after getting some long hair extensions put in at West Hollywood's Nine Zero One salon.

Gomez, who took home the award for Favorite TV Actress at the 2012 KCAs, wasn't the only star to hit up the celebrity hair hotspot this week.

VOTE: Which celeb has the best hair in Hollywood?

Hilary Duff, who just gave birth to son Luca Cruz on March 20, rewarded herself with a beachy blowout at the salon on Thursday.

"Just got my hair did from my girl Riawna Capri, thanks love! I'm feeling fresh! Heading back home to hang with munchkin :)" the 24-year-old posted to her Twitter, post-visit.