1st Single (April-July 2013) Come & Get It 2nd Single (July-October 2013) Slow Down 3rd Single (October 2013-February 2014) Stars Dance 4th Single (February-May 2014) Write Your Name
Write Your Name will NOT be a single.
Save The Day and/or Undercover will be in that 4th and 5th single consideration.
Don't you all come for 1D just because they're not giving Selena that #1 album exposure on iTunes! Besides, it's just an EP of their new song plus a few remixes, so it will only count towards the singles chart anyway.
I don't think "Undercover" will be the 3rd single. It's a great song, but it sounds too similar to "Slow Down". I know they were both produced by The Cataracs, but they use very similar production techniques.