I love great artists, Warren said Thursday at DeadlinesSound and ScreenFilm event.
I love iconic artists.
Warren had written songs for Estefan and Carlisle before.

Parton was a first.
Producer Damon Elliott coordinated recording all of the artists in different locations.
Carlisle was in Mexico City and Estefan in Miami, for example.
None of them are in L.A., Warren said.
Warren said she still gets turned down, but her persistence often pays off with big hits.
They dont all say yes, Warren said.
The famous one is I had to hold Chers leg because she hated If I Could Turn Back Time.
All five 80 for Brady singers said yes.
And so did another top artist.
Taylor Swift collaborated with Warren on Say Dont Go for her album1989.
Her vaults a pretty cool place to be especially when it comes out of the vault, Warren said.
Now shes a thousand times bigger than she was.
Ive never seen it since the Beatles.
Warren said she got the call from Swift months ago.
Once released, Swift also sent Warren a thank-you gift.
It was cool enough she used the song, Warren said.
She didnt have to send me flowers too.
Check out the panel video above.