Jay Leno’s going all out to reclaim the mantle of King of Late Night — the former and future The Tonight Show host has got an A-list lineup of guests for his return to 11:30 p.m. on March 1. In the first week, Jay will welcome the cast of MTV's Jersey Shore, news-making American Idol judge Simon Cowell and Matthew McConaughey, as well as Vancouver Olympians Apolo Anton Ohno, Shaun White and Lindsey Vonn. Musical guests will include Brad Paisley, Avril Lavigne, and Joan Jett. Jay is back at the helm of The Tonight Show after Conan O’Brien was ousted amid controversy last month, and the show has since lost the No. 1 ratings spot to Late Night With David Letterman. In coming weeks, Jay has lined up guests including Kristen Stewart, Jamie Foxx, Dakota Fanning and Kim Kardashian.