Mash-up Ideas

I don't know if it means I'm becoming senile or what, but instead of just having one song in my head, these days I have up to five. Each is musically related to the other. For example:

• "Part of Your World" (Little Mermaid) + Xanadu (Olivia Newton-John) + "Laverne & Shirley Theme"
  
• "Let Go" (Imogen Heap) + "Shattered Dreams" (Jonny Hates Jazz) + "The Way It Is" (Bruce Hornsby & the Range) + a particular song by Tori Amos that I can't remember the name of "Winter" (Tori Amos)