Justin Bieber has become such a musical sales force that now the only competition left is, well, Justin Bieber. After landing the #1 album last week with his Never Say Never - The Remixes, Bieber had to settle for #2 this week to make room for Adele's 21. But the rush of attention on the now-17-year-old pop star thanks to his big-screen debut in "Justin Bieber: Never Say Never" helped propel his nearly year-old My World 2.0 back into the top five at #5, a feat that Billboard Associate Director of Charts Keith Caulfield said was a "very big deal."

In fact, Bieber is the first artist to have two albums in the top five at the same time since he achieved the same feat nearly a year ago. The last time it happened was in March of 2010 when 2.0 debuted at #1 while the singer's debut, My World, was at #5. Caulfield said that before that, it hadn't happened since October 2004 when rapper Nelly's simultaneous album release of Sweat and Suit both crashed the top five at #1 and #2.

If you go back to the last artist to do it without releasing two new albums at the same time, you have to look to May 2003, when 50 Cent's Get Rich or Die Tryin' was at #5 and his The New Breed CD/DVD debuted at #2.

"Any way you look at it, it's unusual," said Caulfield, noting that even with all their success on the charts lately, not even Lady Gaga or Taylor Swift have notched that achievement. "It helps that you have four Bieber albums to choose from on the charts right now."