Rockstar Post Malone Feat. 21 Savage Download 'Rockstar' on iTunes
The US band Karmin is made up of Amy and Nick, they met in college and released their first album in May 2010.
They look set to score their first hit in the UK with 'Broken Hearted', a song which has already made it into the charts back in the US.
Karmin are already pretty well know for their YouTube covers of songs by the likes of Chris Brown and Nicki Minaj, which have bagged them over 178 million views.
Take a look at the video for 'Brokenhearted' and let us know what you think below...