Madonna

Taylor Swift, Lady Gaga, One Direction and more have all released hits that sound a lot like...well, other hits.

The enduring effect of 'Say cheese!'

The Swedish producer and DJ died Friday at 28.

A whole lot can change in a single decade.

Sin City is pop's new HQ.

They met at an Oscars after-party where Madonna teased a skincare collaboration with Kim Kardashian.

From Taylor Swift's '...Ready For It' to Salt-N-Pepa's 'Push It,' these tunes are bound to get you amped.

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

Now THIS is art pop.

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

On #MLK50, the civil rights leader's legacy means more to America than ever before.

Pop stars from different eras, plus the 69-year-old new face of CoverGirl, in today's Pop Bits.