Kirsten DunstKirsten DunstSome whirlwind romances turn out to be more of a guff of air.

And so it seems with Kirsten Dunst and Johnny Borrell.

After a full-on three weeks together, it appears that Kirsten and her Razorlight frontman, Johnny, have gone their separate ways.

In fact, according to media reports, he appears to have gone back to an ex-girlfriend, Fabiola Gatti - however, this is yet to be confirmed.

Johnny and Kirsten met back in March at a Razorlight gig in LA. Kirsten then joined him when he went to South By SouthWest music festival in Texas.

It was at this event that they were spotted all loved-up and canoodlesome.

Kirsten with Johnny Borrell and South By SouthWestKirsten with Johnny Borrell and South By SouthWestKirsten then even jetted to London to hang out with her new beau.

However, Kirsten is now back in Hollywood and single, it seems.