Mario Lopez Goes 'Extra Lean'!

"Extra" host Mario Lopez is really excited about his latest project. He has co-written a seven-week nutrition plan in his new book, "Extra Lean," which can help you lose up to 14 pounds in 14 days!

He's getting the "Extra" staff in shape, too! Check out who's up for the "Extra Lean" challenge, with pics and bios, recipes, video and more!