All About That Bass - Meghan Trainor
Chandelier - Sia
Anything by One Direction
Birthday - Katy Perry (I love Katy but this was a terrible single choice!)
Anaconda - Nicki Minaj
Happy - Pharrell

While I wouldn't say they were the worst I cannot understand why Rather Be, Happy and All of Me were insanely popular. I found these songs to be bland and lacking oomph.