"What Happened To Us?" is a song by the American rock band Hoobastank, which was released in 2012 as a single from their album "Fight or Flight". The song tells the story of a relationship that started out strong, but ultimately ended in loneliness and regret. The lyrics describe the initial excitement of finding someone who understands and helps to fill a void, but the relationship doesn't live up to expectations. The couple realizes that they kept things inside and didn't communicate properly, causing the relationship to fall apart. The song also touches on the idea that others may have doubted the strength of the relationship due to their age, but there was a belief that they could make it work. However, they ultimately couldn't overcome the lies and lack of communication that plagued the relationship. The chorus of the song serves as a lament for what could have been, questioning what happened to the once-perfect couple and the possibility that they may have lost the person they thought was their soulmate. Overall, "What Happened To Us?" is a song about the challenges of relationships, the importance of communication, and the regret that can come from not putting in enough effort to make a relationship work.