"Glee" 4 is all about moving on. After tackling new beginnings, the hit show choir dramedy is now exploring new challenges for its cast. In Finchel's case, Rachel thanks Santana for coming to Finn to defend her honor, so to speak. But that's getting ahead of the "Guilty Pleasures" story. Meanwhile, fans need to wait a couple more weeks to see American Idol 2012 runner-up Jessica Sanchez on the show.

SPOILER ALERT: This article contains spoilers for those who have not seen the latest episode of Glee 4. Keep reading at your own risk.

Here are 5 of the best highlights of the special Glee 4 episode called, "Guilty Pleasures" (Episode 17):

5. Sam and Blaine really make a good team in Glee 4. In the past, they exposed Warblers' scheme and reclaimed a slot for the Regionals. Now, they led a leader-less New Directions to an indulgent and fun music show.

4. Kurt is discovered with a boyfriend pillow, but he wouldn't share. So he buys two more as gifts to two of his best friends.

3. Rachel confronts Brody about his career on the side - the part where he trades sex for money. But he turns the table and slams her for sleeping with Finn on the cancelled Wemma wedding.

2. The Glee 4 younger kids at Lima pulled a very enjoyable Spice Girls number. (They're beginning to blend very well.)

1. Sam tells Blaine it's cool that he's into him. He says, he even finds it flattering. Then the gang pulls a "Mama Mia" number to close the "Guilty Pleasures episode.

Glee 4 Scoop: Jessica Sanchez in May, Rachel Berry's Mum Returns

Next up - Rachel's "Funny Girl" edition. Idina Menzel is returning to the series to reprise her role as Rachel Berry's mother. Also making a special 2-episode appearance is American Idol 2012 runner-up Jessica Sanchez.

Sanchez, 17, recently launched her debut single "Tonight" feat. Ne-Yo on American Idol Top 8 Reveal Night. She is visibly more confident, edgy, and obviously trying to be sexy. In an interview with The Hollywood Reporter, Sanchez says her Glee 4 role is "a student from a rival school who's this legendary diva powerhouse singer." Fans have to wait a bit longer because Sanchez has yet to film for Glee. Her character appears in the last pre-finale episodes.

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