The star met the famous producer at a record studio before the pair started to get close and while it has only gone as far as a ''kiss'', she hopes they can ''step it up a level''.
She told The Sun newspaper: ''After our first date he started running his hands all over my body, and he had a kiss outside the Playboy mansion, but that was as far as it went.
''Soon after we saw each other at Snoop Dogg's birthday party and I went back to his, but we ended up just chilling out. Since then we've been out about four times - but still haven't had sex or anything more than a kiss.
''I'm really hoping that when I come to the UK this year we'l be able to step it up a level.''
She also revealed the Black Eyed Peas star is a big family man, but is enjoying his time in the UK with his role as a judge on 'The Voice'.
Carla added: ''Will loves being at home with his mum, but he seems more relaxed in the UK.
''He told me he likes going out in Newcastle and I promised I would take him out in Liverpool and Manchester this year. So let's see what happens.''