West, 33, joined Kardashian, 30, on the set of her first music video shoot for the breakout single on her debut album this past week, and it's off to a great start.
"She's having so much fun. The music is upbeat and fun dance music," a source tells PEOPLE. "She's loved being in the studio."
Kardashian herself couldn't contain her excitement – or anxiety – about her video, which is being directed by Hype Williams (who has teamed up with artists like Jay-Z, Christina Aguilera and West himself).
"It's going down in here!!!" she Tweeted Tuesday, the same day she was spotted at the studio with West. "I'm turning it ooooonnnn!!!!"
"What an amazing day!!!" she added. "Feels so good to overcome a fear."