Did you guys know that May 7th marks National Space Day? Today is all about outer space, so we thought we'd pick our fave song of all time about the universe for this edition of Lyric Battle: Katy Perry ft. Kanye West's "E.T."! But wait — we usually pick two songs to battle against each other, right? Well, this time around we want you to vote for your favorite verse from the out-of-this-world song: will it be Katy's line or Kanye's rhymes? You decide: which verse is more space-like?