O + I = ?

Your Hands in Mine - Explosions in the Sky
Postcards - Furniture

Snow Brigade - Mew
Take Me Somewhere Nice - Mogwai
Follow the Map - Mono
Where Does the Good Go? - Tegan & Sara
Why Do You Let Me Stay Here - She & Him
Some of Mia Palencia's

Which explains why I can only hum the latest songs played on the radio.