jsparks112308x.jpg Jordin Sparks will join Britney Spears' Circus as special guest on the second North American leg of the tour, according to a statement on Brit's official site.

Sparks will perform on the U.S. part of the tour including dates in New York City, Los Angeles, Boston, Philadelphia, Miami, Detroit, Chicago before finishing the run on September 26 and 27 at Mandalay Bay Events Center in Las Vegas. This is definitely the biggest gig she's ever gotten...congrats!