From Justin To Kelly: Carly Rae Jepsen Explains Instagram Pic

What do you get when Carly Rae Jepsen surprises Kelly Clarkson in Justin Bieber's dressing room? An Instagram photo opportunity!

"We were at the Capital Ball in London," Jepsen told before taking the stage in Chicago for the Pop-Tarts Crazy Good Summer Concert. "I met up with [manager] Scooter [Braun] and I went to go say hello to Justin Bieber because we hadn't seen each other in a couple weeks, and I go into his dressing room and I'm like, 'Hey, Justin,' and Kelly Clarkson is there."

The encounter took both "Idol" alums (Jepsen finished third in 2007 on "Canadian Idol," while Clarkson took the title during the first season of the American version in 2002) by surprise, the "Call Me Maybe" songstress recalls.

"She turns around and is like, 'Carly Jepsen,' and I'm like, 'Kelly Clarkson,' " Jepsen said. "Then we all had a gush fest and decided to do a picture."

The snapshot shows the group gesturing "call me" and was added to Carly Rae's then 397 photos. It received 33,443 likes and 786 comments and counting.

"She's really lovely; I actually think she's probably one of my favorite celebrities," Jepsen said about Clarkson.

Whose Instagram account do you love to follow? Sound off in the comments below!