Credit: Humberto Carreno/

Hollywood homecoming dance?

Selena Gomez has been shy about her relationship with Justin Bieber, 17, but on the Late Show airing Wednesday night, David Letterman put the Ramona and Beezus star on the spot.

"Are you dating?" asked Letterman, as he held up a photo of the two teens cozying up at the Vanity Fair Oscar Party February 27. "It was like a little prom night?"

Gomez, 18, offered a coy smile instead of a confirmation, and said she'd known the "Baby" singer for more than two years. 

"His manager called my mom, who's my manager," Gomez revealed about their meeting.

While Letterman continued to press her on the subject, the actress simply blushed before admitting: "He's been in my life for so long. It's just nice to have someone that understands what you're going through."