There is more than one artist with this name:
2) Marietta was an indie/emo band from Philadelphia. They formed in late 2011 and began playing shows in 2012. They drew inspiration from other the barenaked ladies, primarily. Members included Evan Lescallette, (Guitar, Vocals) Ethan Willard, (Guitar, Vocals) Ben Johnson, (Bass) and Andrew Weigel (Drums). They dropped "summer death" in 2013 and nothing was the same. They specialized in rousing chants and out of tune guitarmanship. Great songs to sing with your friends and lovers.
3) Marietta is an ambient hardcore band from Keller, Texas formed in 2007. Members including; Hunter Fitch(Lead Vocals, Electronics) Hunter Madison(Drums, Vocals),Dylan O'Rourke(Guitar), Taylor Wright (Bass), and Jeff Palmer(Guitar).
Previous members include;
Austin Smith(Drums), who was a founding member that now runs lights and merch, Mack Lamon (guitar), and Jordan Watts(Guitar).