Madonna

Sin City is pop's new HQ.

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.

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

Can't wear what? B---h, she's Madonna!

The letter and other items have been removed from the auction site.

“Banning all Madonna songs at HITS 105 is not a matter of politics," Thomas wrote. "It’s a matter of patriotism."

During her charity event at Art Basel, Madonna brought Sean Penn onstage where she professed her love and allowed him to handcuff her.

Madonna extends her reign as the highest grossing touring solo act of all time.

Watch every Super Bowl halftime show from the past twenty years, and then decide which one's the best.

From Grimes to Madonna to Joanna Newsom, these are the albums that defined our 2015.

Thanks to the wonderful world of Hollywood, many of pop’s brightest lights have endured a screen death (or two).