This reminds me of how Ke$ha apparently had a dream that she and Gaga were in kindergarten together, and were coloring at the same table or something like that. Isn't that adorable? That is how Ke$ha would see Gaga: as a potential playmate to make pop with.
Isn't it sort of sweet? It's as though Gaga had a small conversation with each of them. Katy met some terrible guy, Taylor was bothered by paparazzi, Rihanna was feeling sexy/romantic, Nicki was feeling triumphant, and Gaga popped up to sympathize or celebrate. (And Demi's just a big fan, obviously.)