Harley Pasternak, knows more than just a thing or two. The popular fitness expert - who spoke exclusively to HELLO! - has a lengthy list of celebrity clients including Ariana Grande, Megan Fox and Jessica Simpson too.MORE: The Voice's Ariana Grande as you've never seen her beforeWhile every one of them has a bespoke regime, Harley revealed to us what his own daily diet looks like and it's not just healthy, it's delicious too. WATCH: Ariana Grande and Blake Shelton joke around on The