I guess Gaga hates Telephone (not the song but the way it was written / recorded). She hates Money Honey (I agree with her on that one) and I guess she hates Starstruck too, that song sold 800k / 1M without being a single and she didn't release it !
Katy is bitter that Dark Horse stole the spotlight from her personal favorite Unconditionally
She is right tho, Unconditionally is one of her few good songs, with Thinking Of You, Waking Up In Vegas, Hot N Cold, One Of The Boys and The One That Got Away. GP doesn't know N E THING
Shakira doesn't use her 1st two albums (Magia & Peligro) because, even though she wrote some of the songs (5 out of the 8 on the 1st & 4 out of 10 on the 2nd), she didn't feel entirely in control of her sound. You can tell that the songs that she wrote were the direction she wanted to go in (more of a rock sound) & that her label was trying to make her do very safe pop.
She hasn't performed any songs from these albums since maybe 1996/7 where she performed Magia once I think lol.
After that she took complete control of her career and has been either the songwriter/composer/producer or a combination of all on all of her music since 1995 (except for 1 song which was a bonus track - Chasing Shadows which was written/produced by Sia & Fernando Garibay).