Don't forget the most obvious ones:

2009: Gaga wears costumes.

2010: Katy wears costumes.

2009: Gaga puts on elaborate performances.

2010: Katy puts on elaborate performances.

2009: Gaga wears machine gun bra.

2010: Katy wears whipped cream bra or whatever.

Gaga is the puppet master, Dr. Luke and co. are her puppets.

The fact that Beyonce had a Basic Instinct-inspired video (Ring the Alarm) and I didn't know.

She even danced and had a lot of choreography

Chasing Time >

*Poker Face

2010 Kesha makes a gay-empowerment anthem
2011 Gaga copies it but makes it a tad more homosexual

Lady Gaga made this happen

I love her but based on those videos, you can tell that Twigs sounds awful live. She's nothing without reverb.

2012: Keshus is Over
2013: Gaga is Over

Will she ever stop?

Anahí could've become the next Shakira but she is about to marry a gay politician, Bye music career

2014: Kesha comes back at the top
2014: Gaga tries to and plays a saxophone(?)

Billboard: No more drama. Azealia Banks electrifies Coachella delivering a career-boosting, drama-free set.

Rap-Up: Azealia Banks Makes Triumphant Return to Coachella

The fact that she's already inspiring so many of her peers . Imagine in 20 years when her more radical looks and ideas become more accepted. Rihanna, being one of the more out-there popstars aesthetically (she's not leashed by Dr Luke into being forever sweet 16) is already taking notes with the whole "ugly is beautiful, I have caterpillars for eyebrows" thing.

I bet Lady Xerox will chain herself to a radiator next

At the top of Dr. Luke's rape list or?

I feel like Gaga's new album will be inspired by Adele tho