icon Updated at 02:26 AM EDT, Thu Mar 21, 2013

Mayweather vs. Guerrero: Both Make Their NCAA Picks

LAS VEGAS - As millions of sports fans across the country lock in their NCAA Men's Division I Basketball Championship predictions by filling out their tournament brackets, Eight-Time and Five-Division World Champion Floyd "Money" Mayweather and Six-Time and Four-Division World Champion Robert "The Ghost" Guerrero have done the same from their respective Las Vegas training camps.  Mayweather and Guerrero joined the likes of Bill Cowher, Charlie Rose, Sharon Osbourne, Shemar Moore and other celebrities getting in on the fun.

Mayweather and Guerrero are preparing to face off for Mayweather's WBC Welterweight World Championship on Saturday, May 4 at MGM Grand in Las Vegas, but before they do, see how they stack up against one another with their NCAA tournament predictions at CBSSports.com.

FLOYD MAYWEATHER'S BRACKET: http://cbsexperts.mayhem.cbssports.com/brackets/printable-bracket/0/9f3ce17cfad07e8494cec8bf71925fd5?randkey=415208

ROBERT GUERRERO'S BRACKET: http://25.media.tumblr.com/cc823f76c9dde3b30afd7b000f3c3732/tumblr_mjzouzm3DQ1s2mllqo5_1280.jpg

To see all of the celebrity NCAA brackets visit CBSSports.com College Basketball Blog:http://www.cbssports.com/collegebasketball/blog/inside-college-basketball/21919241/ncaa-brackets-grammy-nominated-artist-wale-picks-wisconsin-to-win

"MAY DAY: Mayweather vs. Guerrero," a 12-round fight for Mayweather's WBC Welterweight World Championship, is promoted by Mayweather Promotions and Golden Boy Promotions and sponsored by Corona, O'Reilly Auto Parts and AT&T.  The mega-event will take place Saturday, May 4 at the MGM Grand Garden Arena in Las Vegas and will be produced and distributed live by SHOWTIME PPV® beginning at 9:00 p.m. ET/6:00 p.m. PT.  Also featured will be Daniel Ponce de Leon vs. Abner Mares, a 12-round fight for Ponce de Leon's WBC Featherweight World Championship.

Remaining tickets for "MAY DAY: Mayweather vs. Guerrero" priced at $1,500, $1,250, $800 and $600, not including applicable service charges, are on sale now with a total ticket limit of 10 per person.  To charge by phone with a major credit card, call Ticketmaster at (800) 745-3000.  Tickets will also be available for purchase at www.mgmgrand.com or www.ticketmaster.com .