This make-out sesh came one day before Miley and Liam Hemsworth, 29, called it quits after around eight months of marriage. The source says that Cyrus' sisters support her decision and want her to be happy.
The neon-lit lounge features private booths and karaoke rooms, which are dubbed "Sing Or Die" suites. The break up was even more of a big deal since Miley was spotted kissing Brody Jenner's ex-girlfriend Kaitlynn Carter while they lounged on a yacht in Italy.
The VVVIP venue is a favourite of stars including Drake and Katy Perry.
"Miley seemed especially great", the source added.
And, in an unexpected turn of events, Kaitlynn's ex-husband Brody Jenner is, apparently, "totally okay with it".
Miley Cyrus has no plans to file for divorce just yet. I just, I'm here for her, obviously, and I've been spending a lot of time with her. "She has been ready to put out music and be back in the game touring and performing", a source told E! In fact, news is that they might just reconcile.
Cyrus has already returned to the recording studio, sharing a picture on Monday showing her behind a microphone.
The way they were! "Liam loves Miley and is crushed by all of this".
He told them: "You don't understand what it's like".
Hemsworth appeared to be addressing a Daily Mail story that characterized the Aussie as emotional and downcast while spending time with his older brother, "Avengers" star Chris Hemsworth, in Byron Bay following news of the split.
Miley and Liam exchanged vows at their home in Nashville, Tennessee on 23 December, after dating on and off for 10 years.
"Ever-evolving, changing as partners and individuals, they have decided this is what's best while they both focus on themselves and careers", read a statement released to People magazine on Sunday.