song in forever 21 i heard yesterday!!

i dont remember all the lyrics
i just heard bits && pieces
but it was saying how this girl was doing fine
then "he sat there with some new girl..guess you have replaced me..
just the thing to ruin my day..but i cant go back now"
can you help me please??
:[[[

nevermind, i found it:]]

Im trying to find this song I listened to in Forever 21. Its been driving Me INSANE ! it has this backgroung music that reminds me of Scooby Doo or some othe "mystery" type music. Try and help me out. i've been searching and I just can't find it, I think it was a girl (maybe but i'm not entirely sure) and I think it was pretty long (but i'm not a very time reliable person) Help me if you can

The background Mystery type music was like in "Bar Star" by Kudo only louder. Its lik do do do do de do de do like a scale and high pitched almost reminds me of the backgroung to "Get Outta My Head" Ashlee Simpson

It may have been sung by a guy and a girl. I heard this song back in, April or March

i work at forever XXI and i have to figure out the lyrics for a song to find out what it is and who its by.

theres a song that starts off by going "doo doo do doo doo.." its a girl with a voice kind of like corinne bailey rae but higher kind of?
the song is fast pace. its on their playlist right now