Demi Lovato and Naya Rivera 'Glee' Make Out [VIDEO]: 'X Factor' Songstress Gets Hot-and-Steamy as Santana Lopez's Love Interest, Big Sean 'Jealous'

Demi Lovato will star as "Dani" (Santana Lopez's gorgeous love interest) in the upcoming season of "Glee." And how did actress Naya Rivera prepare for her hot-and-steamy onscreen debut with the "X-Factor" starlet? By making out in the trailer before shooting their romance scenes, of course!

In a recent interview with Access Hollywood Live, the 26-year-old "Glee" beauty explains how she "handled" the "lady bond vibe" with 21-year-old Lovato:

"I made out with her in my trailer before we shot the scene, so I just warmed her up."

And what did Rivera's rapper boyfriend Big Sean think of that?

"He was like, 'Oh man. I'm out of town. I'm jealous.'"

What guy wouldn't be!

Check out the interview here - Rivera also talks about the devastating death of co-star Cory Monteith:

"Glee" season 5 premieres on FOX on September 26.