Video: Selena Gomez sings Lady Gaga & talks Katy Perry

Selena Gomez performs at the 02 Shepherd's Bush Empire, London. Photo via Newscom

Selena Gomez sang Lady Gaga songs and chatted about her favourite singers as she was having her make-up done.

The 18-year-old pop singer spoke about Gaga and Katy Perry.

While she was talking about Katy, Selena mentioned the song that Katy wrote for her second album A Year Without Rain.

The track is called Rock God.

Check out the video of Selena below.