MILEY & DAVID CALABO

MILEY CYRUS AND DAVID ARCHULETA HAVE RECORDED A DUET:

(Reigning "American Idol" runner-up) DAVID ARCHULETA will be guest-starring on this Sunday's episode of "Hannah Montana". We'd heard that David was going to be popping up on the show . . . but we didn't know that his appearance would include a DUET between David and MILEY CYRUS.

On the show, David (playing himself) and Miley record a song together. It's called "I Wanna Know You" . . . and yeah, it WILL be released for real.

(--Meanwhile . . . for no particular reason at all . . . here's a video clip of Miley acting incredibly GOOFY on some British talk show . . .) http://www.youtube.com/watch?v=Skvg2dnMW44