TV: Singers In Series

Name these singers who played recurring characters on TV dramas or sitcoms.

1. This head of a musical dynasty played Capt. Calvin Spalding on "M*A*S*H".
   
2. This chap appears as the town troubadour on "Gilmore Girls". (I think he only sings, so this doesn't really count.)
   
3. This rock chick was Leather Tuscadero on "Happy Days".
   
4. This '80s singer thought it was hip to be seen on "One Tree Hill". That's news to me.
   
5. This '80s Scottish singer says she could be happy appearing on "EastEnders".
   
6. Nickelodeon's "The Adventures Of Pete & Pete" had a lot of rock & roll guest stars (Debbie Harry, Gordon Gano, Juliana Hatfield, Kate Pierson, Michael Stipe), and this punk godfather played someone's father in two episodes.