The singer with The Rising boy band was impressed with the English girls he met on a visit to the country, and admitted he's been intrigued by it since he saw Emma play Hermione Granger in the 'Harry Potter' film franchise.
He told BANG Showbiz: "British girls are cute, the accent really helps. We had a couple of our fans at the airport and so I tweeted that our British fans were cute, and straight away I got like 6,000 tweets back from the states like, 'oh - so we're not cute?' I was like, no, no, no that's not what I was saying!
"But I admit, my crush ever since I saw the first 'Harry Potter' movie has been Emma Watson. Especially with her short hair, everything I hear about her is so good."
His bandmate, Kendall Schmidt, said although they've had their eyes on some girls, they've not thought up any good introductory lines to use on them yet.
He said: "We're not very big on pick up lines, I like to just say 'hi'. If I see a girl I like in a bar I'll just go up and ask her name, I like it when they ask your name first though!"
Big Time Rush's debut single 'Boyfriend', featuring Snoop Dogg, is out now, and the band play their debut UK show on gig on April 19 at the O2 Shepherds Bush Empire in London. For tickets visit http://www.livenation.co.uk/artist/big-time-rush-tickets