What is the name of this song?

I heard this song playing at work. I'm not sure who it's by. It's pretty slow and sounds like it could be either Lady Gaga, Katy Perry or Christina Aguleria. The song meantions the word SKYLINE. that's the only word I can remember. I'm pretty sure it's gaga. Do you know what it is? Thanks so much. I think it's a relatively new song.