It looks like two of McKinley High's most popular New Directions' singers aren't feeling very Gleeful after Season 3 wrapped. Although there is no official word as to whether or not Amber Riley (Mercedes) or Dianna Agron (Quinn) are returning for Season 4, the future looks pretty bleak for their characters based on some recent Tweets. Riley's not-so-cryptic Twitter message last night definitely implied the curtain had come down for her. She Tweeted, "That's a wrap on Amber Riley! Just closed a chapter in my life, the only thing I've known day in and day out for three years. I'm going to miss the whole Glee family, seeing them everyday. I have so many brothers and sisters now :) But I am looking forward to a much needed and deserved summer vacation! SCHOOL'S OUT Glee Kids! Let's play!" She added, "Stay tuned to see what's next for Mercedes Jones." As for Agron's future with the hit FOX show, it sounds like the fat lady has sung. The blonde beauty Tweeted, "I don't know all that is to come, but I know what a day like this means. Four years of love, light & support. To the cast, crew & creators. And to all of you that have shown your love along the way. We just can't thank you enough. This has always been a very surreal experience." As for leading lady Lea Michele, the show will definitely go on. According to TooFab.com, it's also a given that the vocal powerhouse will continue take the New Directions in the right direction next year. Michele Tweeted, "Said our goodbyes to the rest of the cast who wrapped for the season just now. So proud to work with such an amazing group of people."