Ariana Grande ''could use help'' with her wardrobe, according to George Kotsiopoulos.

The 'Fashion Police' star and veteran stylist doesn't think the pint-sized 'Problem' hitmaker has found her own unique style yet and says she should seek the advice of a style expert.

He exclusively told BANG Showbiz: ''I haven't been a fan of what Ariana Grande [has been wearing]. I don't think she's really found her look. It's tough, because she looks very young and I think she wants to look really great, look really sexy - and she's not, I think she could use some help.''

George - who is part of the hit E! show with Joan Rivers, Kelly Osbourne and Giuliana Rancic - is full of praise for A-list icon Jennifer Lopez, however.

He enthused: ''Jennifer Lopez is one that always brings it because she looks better than she's ever looked. She's in her forties and I don't understand ... she must have a painting in a closet somewhere that's ageing, because she certainly is not!

''I think it just comes with experience and knowing what works for your body and knowing how to do the right hair and makeup for each look.

''She's not dressing like she did 20 years ago, it's evolving, but it's still kind of her - she's a freak of nature. She always looks impeccable.''

George is also a fan of pop star Rihanna's edgy style.

He added: ''She owns what she's wearing and has the confidence. I know some of it's super crazy and out there and wacky, but it just works. She can pull it off in a way that no one else can. I think it's a testament to having true style.''

E!'s 'Live from the Red Carpet: The 2014 Primetime Emmy Awards' airs Monday 25th August at 11pm. 'Fashion Police: Emmy Awards' airs Wednesday 28th August at 9pm.