Celebrity pairings ride along in a car together as they sing tunes from their personal playlists and surprise fans who don't expect to see big stars belting out tunes one lane over.
2013
1973
1955
1988
2009
2001
1961
1983
1993
1954
1952
1962
1999
2005
2003
2019
2004
1997
1985
