On 13 July 1985, Collins performed with George Thorogood and the Destroyers at "Live Aid", appearing as guest soloist on "Madison Blues"; the US part of the charity concert was held at JFK Stadium in Philadelphia and, with simultaneous broadcasts in other countries, was viewed by over 1.5 billion people. In December 1986, Collins appeared in concert with Etta James and Joe Walsh at the Wiltern Theater, in Los Angeles; the concert was subsequently released on video under the title "Jazzvisions: Jump the Blues Away". The backing musicians for the concert were Rick Rosas (bass), Michael Huey (drums), Ed Sanford (Hammond B3 organ), Kip Noble (piano) and Josh Sklar (guitar). Also in 1986, Collins won a Grammy Award with Robert Cray and Johnny Copeland for their album "Showdown!" Collins finished working on his seventh Alligator album, "Cold Snap", by October 1986. It was released shortly afterwards to good reviews and received a Grammy nomination for Best Traditional Blues Recording of 1987. Collins cited the album as personally important to him because of the involvement of the organist Jimmy McGriff, an early musical idol, with whom Collins had played in Kansas City, Missouri, in 1966.