My favorites are.
From Autobiography - Autobiography, Pieces of me, Love makes the world, Love me for me, Nothing New and Undiscovered.
From I Am Me - Boyfriend, In Another Life, Beautifully Broken, I am me, Kicking and Screaming and Eyes wide open.
From Bittersweet World - No time for tears, Outta my head, Little miss obsessive, Hot stuff, What i've become and the masterpiece Bittersweet World