The new single "Baby Do not Lie" is sure after the first listen not "What you waiting for?" and no other "Hollaback Girl", but the song remains definitely in mind. Is probably because that Ryan Tedder as a writer / producer with had a hand in the game and actually produces only yes earwigs.
I do not think that Gwen can tie with "Baby Do not Lie" to their very great success, but the song is definitely a cool sign of life from her. Despite the very modern production of the song sounds simple to Gwen, how they might had remembered.