Selena Gomez headlined a UNICEF charity show Saturday night in New York City and it sounded like she was sending Justin Bieber some messages through her music.

The singer, who has songs of her own, instead chose to do a cover of Justin Timberlake’s “Cry Me A River.”

PICTURES: Justin & Selena In His Ferrari

Th 20-year-0ld told the crowd, “I’ve been through a lot the last couple of months. It’s been sad and cool, but interesting. This song definitely speaks to me.”

Cry Me A River is definitely a break up song — look at some of the lyrics:

You don’t have to say, what you did,
(Don’t have to say, what you did)
I already know, I found out from him
(I already know, uh)
Now there’s just no chance, for you and me, there’ll never be
(No chance, you and me)
And don’t it make you sad about it

At the end of the song — she said, “OK enough of that.”