It was done by Tommy Boyce and Bobby Hart
"BOYCE and HART" titled "Alice Long"
Has the lyrics "your still my favorite girlfriend Alice long" sounds like Allison..
Boyce and Hart also had another hit single "I Wonder What She's Doing Tonight"
can be found on YT..
http://www.youtube.com/watch?v=UZLg4BDFlgI
Hope this helped!
GGG