What is now thats what i call music 4?

Now That's What I Call Music 4 is the fourth volume in the Now That's What I Call Music! series, a compilation album series that was first released in 1983. It was released on July 18, 1984, in the United States and Canada.

The album features 24 popular songs from the mid-1980s, including hits from artists such as Michael Jackson, Cyndi Lauper, Prince, Wham!, and Billy Idol. It also includes a number of one-hit wonders, such as "99 Luftballons" by Nena.

Now That's What I Call Music 4 was a commercial success, reaching number one on the Billboard 200 chart and spawning several spin-off albums. It was also the first Now album to feature a bonus track, with the addition of "Relax" by Frankie Goes to Hollywood.

The success of the Now That's What I Call Music! series continued, with subsequent volumes being released on a regular basis. As of 2021, there have been over 100 volumes in the series, making it one of the most successful compilation album series in history.