10 excellent song clips with one thing in common; your preparation to become a CSI

It’s not too hard, so 5 points for spotting the common thing and 1 for naming each and 2 for each correct performer

Great music from Burt Bacarach / BJ Thomas, Rod Stewart, Kim Carnes, Barbra Streisand, Mud, Cilla Black, Sutherland Brothers and Quiver, The Crystal, The Beautiful South, The Beatles