Wonderwall, Oasis. Don't Look Back in Anger, Oasis. Angels, Robbie Williams. Dancing Queen, Abba. Don't You Want Me, The Human League. Come On Eileen, Dexy's. These get played at weddings, at parties, karaoke etc. The first three are more singalong songs, the latter three will get people on the dancefloor at any party in the UK. There are obviously more, just some that came to mind straightaway.

In America, add "Sweet Caroline" by Neil Diamond to the list. Especially if you're from Boston (the song is a tradition at Boston Red Sox baseball games).

Hello Paulo! I cannot comment about Britain but in the United States some of the most popular and timeless songs are: "Eye Of The Tiger" by Survivor "Billie Jean" by Michael Jackson (a lot of Michael Jackson songs are very very popular) "Thriller" by Michael Jackson "Bohemian Rhapsody" by Queen (A British band) "We will rock you" by Queen "Take me out to the ball game" by Frank Zappa (This is more of a sports song but very popular) "Wannabe" Spice Girls (Also from Britian and more targeted towards females) "Single Ladies" by Beyonce ( This song came out in 2008 so it is not "timeless" but it certainly is among the most recognized and popular, specially in the younger generation) The songs I listed are what I think are popular, of course not everybody likes them and it depends on the time of music they listen to but certainly I think most have heard of these. Hope it helps!

Hmm. Hard one to answer. Britain and the US have different cultural songs. However, something like "He's a jolly good fellow." or maybe drinking songs might be the same. Other people should jump in here now.