"Only Team In London With A European Cup"

From TheChels.info - The Chelsea Football Club Wiki

Sung primarily to taunt major London rivals since the 2012 UEFA Champions League triumph.

To the tune of "She'll Be Coming Round The Mountain".

We're the only team in London with a European Cup,

We're the only team in London with a European Cup,

We're the only team in London, only team in London,

The only team in London with a European Cup!