When Rosa is joking about the backstory for "cousin Rosalinda," she says her mom "married a minor league baseball player, but when he got transferred to a team in Florida--" before she gets cut off; this is the reason Bella Swan moved to Forks in Twilight. Rosa had the Twilight books on her bookshelf, before Liz cleared them out.
When Rosa is with Iris at the art gallery and she asks her what's happening Iris replies "your star sign's out of whack." This is an illusion to the Third Eye Blind song that featured heavily in the first season, God of Wine. "A star sign out of whack" is the line said directly before "a fraudulent zodiac" in the song. "A fraudulent zodiac" is the lyric Rosa had written on her hand when she died.