On a weekend that saw more than one unexpected combination of Rockers with Pop stars, Foo Fighter Dave Grohl hatched a supprise appearance by pop crooner Jewel on a Led Zeppelin classic during his group's Friday (9/25) set in Phoenix. Both Mick Jagger and Aerosmith's Steven Tyler teamed up with Taylor Swift during the cousre of the weekend.  There are some Zeppelin songs Jewel's range and style are more suited for, but she apparently wanted to tackle Whole Lotta Love. Here's the result.