There were places we would go at midnight   There were secrets that nobody else would know   There's a reason but I don't know why   I don't know why, I don't know why   I thought they all belonged to me      Who's that girl?   Where's she from?   No, she can't be the one   That you want   That has stolen my world   It's not real, it's not right   It's my day, it's my night   By the way   Who's that girl living my life?   Oh no, living my life      Seems like everything's the same around me   When I look again and everything has changed   I'm not dreaming so I don't know why   I don't know why, I don't know why   She's everywhere I wanna be      Who's that girl?   Where's she from?   No, she can't be the one   That you want   That has stolen my world   It's not real, it's not right   It's my day, it's my night   By the way   Who's that girl living my life?      I'm the one   Who made you laugh   Who made you feel   Who made you sad   I'm not sorry   For what we did   And who we were   I'm not sorry, I'm not her      Who's that girl?   Where's she from?   No, she can't be the one   That you want   That has stolen my world   It's not real, it's not right   It's my day, it's my night   By the way   Who's that girl living my life?   Oh no, living my life