Break up news surrounded Justin Bieber and Selena Gomez once again these past couple of weeks.

It was confirmed that the break up rumors are true after Justin Bieber has been seen replacing Selena Gomez with Kylie Jenner.

This might explain why the "Come and Get It" singer recently unfollowed the Jenner sisters on Instagram.

Justin and Kylie were seen together in Las Vegas on Saturday as they headed to the MGM Grand Garden Arena to watch Floyd Mayweather defeat Marcos Maidana, according to the Daily Mail.

The Instagram war has yet to end after the break up.

The 20-year-old singer posted a picture with Kylie and model Yovanna Ventrua while in Vegas, the biggest insult of all to ex-girlfriend Selena.

There have been reports that Selena Gomez had gotten annoyed with Kylie for allegedly "coming onto" Justin Bieber at the 2014 Coachella festival.

Gomez posted a collage on Instagram on May 4 of John Legend's music video for "All of Me" featuring wife Chrissy Teigen, raising speculation that the 21-year-old is reacting to the Jenner-Bieber date that happened this past weekend, according to HollywoodLife.

After reportedly cutting off several friends in her life, Selena Gomez has been getting relationship advice from none other than Katy Perry.

An insider has revealed to the gossip website, "Katy is honest with Selena and she told her she needs to stick with it this time and really let Justin go."

The source added, "But she also told her that she'll support her no matter what. Katy is very zen about it all."

Katy is reportedly trying to push Selena to get back to her music again, according to The Hot Hits.

The insider revealed, "She[Katy] feels like music saved her after her breakup with Russell Brand so she's been encouraging Selena to write about what she's going through."