Alan Jackson, Kid Rock Head SeaWorld Lineup

ORLANDO (CBSMiami/AP) — Despite the many acts that cancelled to perform at SeaWorld's upcoming concert, fans are still encouraged to rock out this weekend with the headliners who stayed committed.

SeaWorld Orlando on Wednesday announced performers Alan Jackson and Kid Rock will perform at a concert series in which nine other performers dropped out following the release of a documentary critical of the marine park.

Jackson will perform this Saturday at the Bands, Brew & BBQ concert series, followed by Kid Rock on Sunday. Other performers haven't been announced.

Nine recording artists had backed out of performing at the SeaWorld Orlando concert series, including country singers Trace Adkins, Martina McBride, Trisha Yearwood, as well as rock performers Heart, 38 Special and Barenaked Ladies. They made their decision after fans launched campaigns on Change.org citing the documentary "Blackfish."

"Blackfish" explores what may have caused an orca to kill veteran SeaWorld trainer Dawn Brancheau in 2010.

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