Lady Gaga scored her third Pop Clash win in a row, taking down Jennifer Lopez's 'I Luh Ya Papi.' This week, 'G.U.Y.' is up against Katy Perry's 'Birthday.' Which superstar will win Pop Clash? It's up to you to decide!

Lady Gaga is ultra-confident (as always!) in 'G.U.Y.' She knows what she wants and she's not afraid to go after it. We love that the track is reminiscent of her 'Fame'-era tracks. In other words, it's awesome and is sure to go down as another Gaga super-hit.

Katy Perry channels lot of energy and some '90s melodies in 'Birthday.' The innuendo-filled song is super catchy and captures Katy's playful sense of humor. This track makes us want to get up and dance -- whether or not it's our birthday.

Which song should win this week's Pop Clash: Lady Gaga or Katy Perry? You can vote once an hour until the polls close at 3PM ET on April 28.

Listen to Lady Gaga, 'G.U.Y.'

Listen to Katy Perry, 'Birthday'