” You’re not too likely to find a more likable collection of five pop songs this year: Annie goes back to dance-pop basics for the likes of the Pet Shop Boys-reminiscent “Back Together,” the gleefully bleep-bloopy adolescent love song “Ralph Macchio” and “Invisible,” an unexpectedly acid house-influenced self-duet (back to that old “Chewing Gum” vocal trickiness, eh, Annie?). (…) Annie should be saluted.”