The Geordie beauty divorced her footballer husband Ashley Cole, 30, in September and is now hanging out with Dancing With The Stars pro Derek Hough, 25.
'Neither Derek Hough nor Ashley Cole is a good match for Cheryl,' says Perez, 32.
Cheryl, 27, and Derek have never confirmed they're an item - and Perez doesn't think they're going to be walking up the aisle.
'Derek is more of a friend,' he says.
'No one can repair the damage that Ashley did to that girl!
'I doubt Derek's relationship with Cheryl was ever that serious.'
