The singer-and-actress found it awkward to shoot the smooching scenes with the hunk for the promo for Rock Mafia's single 'The Big Bang' because the 'Dawn of the Dead' actor is dating someone she works with.
She told E! News: "There's a pretty cool kissing scene in 'The Big Bang' which is pretty funny because Kevin is actually the boyfriend of someone that works very closely with me. So there was definitely a little awkwardness since she was on set, or whatever."
However, Miley admitted it wasn't all bad as she felt more comfortable filming the intimate scenes with someone she knows rather than a stranger.
She said: "I think it's kind of cool that it's someone that I know and that I really like."
Apart from her embarrassment at having to kiss her friend's boyfriend, Miley - who will turn 18 next Tuesday (23.11.10) - also spoke of her excitement at celebrating her birthday at the American Music Awards (AMAs) on Sunday (21.11.10).
The 'Climb' hitmaker will be joined at the event by Taylor Swift, Justin Bieber, Katy Perry, Kesha and Christina Aguilera, and she is happy that many of her friends will all be in the same place for the big day.
Miley said: "For my birthday this year, I'm just gonna have everyone that I really love be able to hang out. I don't always get to see everyone so it's kind of cool that the AMAs are happening, so everyone will actually be in town for my birthday, which will be pretty cool."