Oasis - "Wonderwall"
Bon Jovi - "Livin on a Prayer"
Van Morrison - "Brown Eyed Girl"
The Foundations - "Build Me Up Buttercup"
Manic Street Preachers - "Motorcycle Emptiness"
Bryan Adams - "Summer of 69"
Journey - "Don't Stop Believing"
Huey Lewis and the News - "The Power of Love"
Bruce Springsteen - "Dancing in the Dark"
The Beatles - "Hey Jude"
Gerry & The Pacemakers - "You'll Never Walk Alone"
Lightning Seeds - "Life Of Riley"
Robbie Williams - "Angels"
John Lennon - "Imagine"
Don McLean - "American Pie"
Aztec Camera - "Somewhere in my Heart"
Blues Brothers - "Everybody Needs Somebody"
Don Henley - "Boys Of Summer"
Monkees - "Daydream Believer"
Neil Diamond - "Sweet Caroline"
Source Ft Candi Staton - "You Got The Love"

... and I'm only just getting started. There's no way I can narrow it down to 10.

Edit: OK, there's 10. Have deleted some UK tracks that didn't chart in the US, which I'm not sure is fair, but it helped narrow it down. I'm not completely happy, and may well swap some around later.