Yes she is. Jen wrote one or two songs on J.Lo album, but wrote more heavily for the 2002 album, "This Is Me.. Then", where most, if not all, the lyrics came from a journal she dotted into between movie sets.

She also wrote the song "Alive" for the film "Enough", for domestic violence victims, and with little to no help, while her husband at the time, Cris Judd, played the melody on a piano.

And unbeknownst to many, she co-wrote Faith Evans 2001 Top 20 hit, "I Love You", which was initially intended for the "J.Lo album".

Yes, Katy has written or co-written every song of hers and has written for many other artists, too...Clarkson, Gomez, Spears, Iggy etc.

Nobody voting "no".

Yes, she's written for herself and also other artists (She wrote "Tell Me A Lie" for One Direction).

When you hear Nicki Minaj spit, Nicki Minaj wrote it.

Yes both of my faves are such amazing songwriters especially Lana but they both never writes for other people. (with the exception of some of Avril songs that had been sang by other singers like
Kelly Clarkson - Breakaway
Demi Lovato & Miranda Cosgrove - Daydream
Leona Lewis - I Will Be
Puffy - All Because Of You
Puffy - I Don't Wanna
and she has credits on Rihanna's Cheers because of the IWY sample too)

Yes. Rihanna, Ne-Yo, Jhené, Ed & Frank are my faves

My faves are Avril and Taylor so YEAH! They are the best currently.

Yes, she is. She has written for some Latin American artists here and there too