After weeks of teasing her new single, Ariana Grande has finally unveiled her new single Problem.

The song - which features Iggy Azalea - has already hit the top spot on the US iTunes chart, with the 20-year old taking to Twitter to thank fans for their support.

Grande tweeted: "Number 1 already loves you never fail to amaze me..... so grateful. I hope you enjoy problem."

She later added: "Been dancing in my kitchen with the crew for hours I can't breathe..... time for a brief sleep. love you."

The Baby I hitmaker also performed the song at the Radio Disney Music Awards in LA over the weekend, donning Mickey Mouse ears and knee-high, white platform boots for her stint on stage.

Problem is set to feature on Ariana's second studio album, which is expected to be released in the very near future!