Beyonce's 4 & 11 Other Numerical Album Titles

​Beyonce is not the first artist to title her album after a number. Here are 11 more - one of which B may have to unseat from the top of the charts when her fourth solo album, 4, is released next month.

Chicago, Chicago III-Twenty 1 (1971-91): Chicago had a simple formula for naming albums: band name + number of albums in band's catalog. Basically, each album was titled according to its sequence in Chicago's discography, just in case they ever forget how many they had released.

​Adele, 19 (2008); 21 (2011): Adele takes the fun out of album titling by naming her CDs after her age at the time of recording. 19 is essentially a breakup album. Current Billboard 200 No. 1 21 follows the same woman-scorned blueprint. We can't wait for her midlife-crisis special, 44.

Lynyrd Skynyrd, Twenty (1997): The title is a tribute to a tragic incident that devastated the band in 1977. Twenty was released 20 years after the plane crash that claimed the lives of three band members: Lead vocalist Ronnie Van Zandt, backup vocalist Cassie Gaines, and guitar player Steve Gaines.

The Doors, 13 (1970): 13 is thirteen of The Doors' most popular hits stuffed into one CD. It grew to become one of their most popular albums, a rare feat for a greatest-hits compilation.

Blur, 13 (1999): 13 was supposedly named after the studio where Blur recorded its sixth LP. The album also sports 13 tracks.