Episode Title Song (Season 2, Episode 4)

In the episode titled "Who Do You Trust?" (Ep. 2.4) of The Hills, there's a song with the lyrics:

Hurts so bad
When it feels so good
She keeps coming back
Like you knew you would
You just can't wait for...


It's sung by what seems like a solo female vocalist. Does anyone know who the artist is and the name of the song? Thank you.

It's the first song played in that episode, right after the opening credits. Thanks.