Today is Oct. 30, and since it's a Sunday, lots of people were celebrating Halloween at parties last night -- including some of the cast members from 'Glee.' Kevin McHale, Dianna Agron and Chris Colfer were all tweeting about their fabulous 'Rugrats' Halloween costumes. In case you aren't familiar with the Nickelodeon cartoon series from the '90s, Agron dressed up as Reptar, McHale was Tommy Pickles' little bro Dil, and Chris Colfer was Spike, the Pickles' pet dog. Also in the Twitterverse, Cee Lo Green wished his late mother a happy birthday and tweeted a picture of him and his mama from back in the day and Usher said "bye bye" to his beard. Read what your favorite stars were chirping about today!