After her last album, Kala, went global in 2007, with the smash single, "Paper Planes," M.I.A. was everywhere. Then, she gave birth to a baby boy (remember her performing in that Mickey Mouse dress when she was 9 months along?), and disappeared for a bit. Now, she's back, with Maya ($13) - or, more accurately, /\/\ /\ Y /\. Full of her usual mix of politics, social activism, and a mix of every musical genre imaginable, /\/\ /\ Y /\ grabs you by the ears and doesn't let go. Our favorites are the beat-happy tracks "The Message" and "XXXO," especially when we're working out.