Katy Perry is at the ''top of her game'' following her split from Russell Brand.

Despite the British comedian - who filed for divorce from the 'Firework' singer in December after just 14 months of marriage - being linked to a whole host of new women following the breakdown of their relationship, he is said to be ''the last thing'' on Katy's mind.

A source told HollywoodLife.com: ''Katy doesn't even mention Russell's name. She has never looked or seemed better. She is on the top of her game right now, and Russell is the last thing on her mind.

''Katy doesn't want to know about what Russell is doing now. She really doesn't even care what he's doing.''

However, the 27-year-old beauty will No Doubt be thrilled to hear Britain's Prince Harry is reportedly keen to bag a date with her, and is hoping to sign her up to Queen Elizabeth's Diamond Jubilee concert this June so he can make his move.

A source told the Daily Star newspaper: ''Harry has a double reason for targeting Katy. First he thinks she is a rocking artist with great songs. But secondly she is single and very sexy.

''He sees this as an opportunity to get close to Katy. And he is confident his charm will win her over.

''And although Katy may have ended it with Russell, she still has a soft spot for wild boys.''