A similar concert last year featuring Mariah Carey had about that many fans in attendance.Portions of Clarkson's free concert will be broadcast on ABC's "Jimmy Kimmel Live."
Previous participants in the Samsung AT&T Summer Krush tour have included Mariah Carey, Gavin Rossdale, Good Charlotte, LeAnn Rimes, Nelly, Smashing Pumpkins, Nas, Ludacris, Plain White T's, The Bravery, Kinky, Big & Rich and The All-American Rejects.
Samsung AT&T Summer Krush kicked off on July 17 with chart-topping band Daughtry performing in Seattle for a special free concert at the Paramount Theatre which aired that night on Kimmel's show. Portions of the performances by Maxwell and Darius Rucker also aired on Kimmel's program.
Clarkson fans may log on to Samsung's Web site to obtain free tickets.
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