Big Sean and Ariana Grande have ''great chemistry''.

The rapper has been dating the 'Problem' singer for two months but has been a big fan of her musical talents for some time.

He said: ''Me and her make a lot of music together and the chemistry between me and her when we work is great.

''We got more in the works too. I feel like her voice is crazy, [just] that that big voice comes out of her is insane. I was probably one of the first people to tweet about her music; me and her been friends for years before anything else...

''I was the first rapper to perform at the White House, I performed there with Ariana so that was an honour.''

The couple - who previously worked together on 'Best Mistake' and 'Right There' - haven't publicly confirmed their relationship but were caught on camera backstage at the recent MTV Video Music Awards (VMAs) holding hands.

However, Sean insists he didn't mind.

He told MTV News: ''I had no problem with it.''

The new couple's romance came as a shock to fans as Big Sean - whose real name is Sean Anderson - only ended his five-month engagement to 'Glee' actress Naya Rivera in April this year.