The boy bands are merging as NKOTBSB for the summer tour, which kicks off on May 25 in Rosemont, IL.
According to reports, American Idol alum Sparks will open for the so-called "supergroup" on most or all of the dates.
Backstreet and NKOTB performed together before at last year's American Music Awards.
Sparks, who recently expressed a desire to work with her 'No Air' collaborator Chris Brown again in the future, just released her new video for the single 'The World I Know'.
Watch the official video for 'The World I Know' below: