Demonstrating that no crowd is too diverse for R&B-ers both young and old, Isaac Hayes and Boyz II Men have agreed to perform at the World Wrestling Federation's fifteenth edition of Wrestlemania, scheduled for Philadelphia's First Union Center on March 28.

Philly natives Boyz II Men, the recent recipients of the new Diamond Award certification from the Recording Industry Association of America, will sing "America the Beautiful" to kick off the multi-match event. But WWF producers haven't yet disclosed what or when Hayes will perform at Wrestlemania, which will feature a title bout of the Rock versus Stone Cold Steve Austin.

Hayes has also been tapped sing at the Wrestlemania Rage party, being held at the Philadelphia Convention Center the night before the main event, and will join a line-up that already includes Big Punisher, the Cherry Poppin' Daddies and Mya (see [article id="1425736"]"Big Pun, Mya, Cherry Poplin' Daddies Set For Wrestlemania"[/article]).