Saturday Snapshots #469

I've found my thrill, and it's serving up Snapshots on a Saturday morning... can you identify the singing people below and figure out how their songs are connected?

15. Gabriel, Simon, MacGregor.

14. Sounds like a big prize winning ticket.

13. It's a bit of a squeeze for this guitarist.

12. Initially German borders.

11. Not the kind of bloke you can rely on for a long-term commitment.

10. Divers do this.

9. Heard twice in a Flintstone cry.

8. Castle approved by the Valley Parent Teacher's Association.

7. Welsh hamster puts biscuit in his tea, adverbially.

6. Aja 3rd.

5. Epitome, of virtue.

4. Hang on to this leading man.

3. Percy's nun.

2. Moaning marijuanas!

1. This here logic game is all screwed up.

Not got them all? Ain't that a shame! Answers tomorrow morning. (You don't have to wait till Blue Monday.)