I'd heard the name, and YouTubed a few of their songs -- but I wasn't taken.
But then I heard the song "Viva la Viva", liked it, did a web search -- and then discovered that it was by Coldplay.
So then I read the Wikipedia page -- and discovered that they did the song "Clocks", and that backwards music video for "The Scientist". Ah! OK. So I picked up their Viva la Vida or Death and All of His Friends album. Pretty good.
It reminds me of in my youth, when my church youth group was on a road trip, and I listened to a Cars album -- probably Heartbeat City -- on cassette, on a friend's walkman. With just about every song, I realized, "Ah! This song I've been hearing on the radio -- it was by The Cars!"
It just takes me a while to pick up on these things.