GIRLS ALOUD singer Nadine Coyle has lashed out at reports that she is dating actor Jesse Metcalfe, insisting she and the sexy Desperate Housewives gardener are just good friends. Coyle denies telling friends that she wants to marry Metcalfe, 27, and has already picked out a wedding dress for the ceremony. Media reports suggest Metcalfe has been unfaithful to her with Los Angeles model Laura Shields. Coyle, "We're good friends. I'm single at the moment and I definitely never had any intention of getting married. I'm only 20."