As the renowned singer Mariah Carey continues her Las Vegas show for Mariah #1 to infinity, hundreds of fans have reportedly gone out to see her perform some of her greatest hits, including one of Carey's die-hard fans and famous pop star as well, Katy Perry.

The two gained so much attention when they posed together at one of Carey's show recently. Perry is apparently a huge fan of Carey which is obvious since she was all dressed up to go to her concert not to perform but just to watch her idol perform her greatest hits.

Perry was quite in the fan girl mood as she posted a photo of herself facing Carey's poster at the Ceasar's Palace writing, "lambily 4lyfe." as caption on Instagram. Not only that, Perry even posted a video of her and Carey taking a photo together writing, "moments".

Indeed, it was a fan girl move for the famous pop star but Perry wasn't an ordinary audience, the singer looked like she was part of it wearing a gorgeous body fitting blue dress with a pink fur draped over her shoulders.

While Carey was in an elegant sparkling black dress and had her hair down and straight. The two were picture perfect together as they posed together which for others is epic since two of the most brilliant artists in the music industry support each other's careers.

Carey's Las Vegas shows are continuing until July 26 but will still have a special show on Valentine's Day 2016 and the whole of February. Carey seemed to be definitely doing a great job in her performances especially since some of the biggest stars come out to see her perform.

In a previous interview with E! News Carey even revealed how she prepared for her concert. "It's been mainly for me about the music and about how to incorporate the songs. Just because they were all No. 1 records doesn't mean they all make an easy set list...a lot of ballads and up tempos. So it's difficult to make it work seamlessly," she revealed.