Katy Perry

Some of the most notable hip-hop trends that have gone mainstream.

Yak Wants to Collab with Katy.

Some of these artists regret their biggest hits.

We didn't even know some of these famous folks were expecting!

'Sending you love & a hug, friend...'

Remember when Kanye West called Taylor Swift out for lying?

From Katy Perry to Cardi B: were these fashion picks really Grammy-worthy?

Sunday’s premiere episode of 'American Idol' on ABC marked a strong start for the retooled reality giant.

Nicki Minaj, Lady Gaga and Ariana Grande also make the list.

From Justin and Janet to Bruno and Beyonce, these 10 Super Bowl Halftime Show collabs were the most memorable.

Remember the iconic 'Lady Marmalade' collaboration? Taylor and Miley's 'Fifteen' duet?

Not even Katy Perry's high-flying could save this broadcast.