Looks like in a world of Macs and PCs, Kelly Clarkson 's definitely a PC.  She'll be appearing at the opening of a new Microsoft store this Saturday in Marin County, California.

According to the Marin Independent Journal , Kelly will give a concert Saturday at the Bay Area store, located in the Village at Corte Madera mall.  On Sunday, former 49ers wide receiver Jerry Rice will make an appearance at the retail establishment.

Kelly is actually an old hand at performing at Microsoft store openings: she sang at the opening of one in the Mall of America in Minnesota in 2010, and last year, she sang at a Microsoft store opening in Houston.

Copyright 2012 ABC News Radio