VIDEO – Bruno Mars meets Boyz II Men, starts singing On Bended Knee

We always knew Bruno Mars was beyond awesome.

After performing at the Las Vegas iHeartRadio fest, Mars was hanging out backstage when his childhood idols, Boyz II Men, decided to pay him a little visit.

Following their own show at the Mirage, Boyz II Men dropped in on Mars and he wasted no time in serenading them with an amazing a cappella version of 'On Bended Knee'. It was so good, in fact, that the Boyz joined in, then they finished it all off by lifting Mars up in the air. Epic.

Tweeting a cute pic of themselves with Mars, Boyz II Men wrote: "@BrunoMars class both on/off the stage!! We walked in..he started singing bended knee SPOT on the note and harmony."

The whole thing really is fantastic (and hilarious) and we're SO happy someone caught it on camera. Thank you, smartphones! *replay*

Check out the video