"I feel big ... like colossal," says Lil Wayne at the beginning of "Mr. Carter" (on which Wayne, whose real name is Dwayne Carter, trades verses with Jay-Z, whose real name is Shawn Carter). And there is no doubt that this New Orleans emcee, riding high on his naughty No. 1 single "Lollipop," is the hottest rapper on the planet right now. (Sorry, Kanye.) His much-delayed, much-anticipated new CD, while losing steam at times, should keep Wayne sizzling throughout the summer. He flows from the hypnotic, bass-heavy "A Milli" to the Babyface-sweetened smoothie "Comfortable." On another highlight, the cleverly constructed "Dr. Carter," Wayne boasts that he has the cure for all of hip-hop's ills over a jazzy, chilled-out groove: "Let me put some more vocab in your IV." But when he likens himself to Martin Luther King on "Playing with Fire," Wayne gets a little too big for his baggy jeans.