What does it really take to become America's next drag superstar? From fabulous divas to outrageous flops, RuPaul gives a behind-the-scenes look at casting for Drag Race.

The queens face the final frontier as they shoot two out-of-this-world sci-fi movie trailers. RuPaul is joined by extra special guest judges the legendary Lily Tomlin and Caprica's Alessandra Torresani.

The girls get physical as they produce their own inspirational workout videos directed by fitness guru Susan Powter. RuPaul & Susan Powter are joined by extra special guest judge La Toya Jackson.

The queens get a wake up call in the competition when they're asked to produce two morning news shows. RuPaul is joined by extra special guest judges Big Love's Chloë Sevigny and Debbie Matenoupolous.

The queens compete in a star-studded TV game show where they must pull out their best celebrity impersonations. RuPaul is joined by extra special guest judges actress-comedienne Aisha Tyler & Amber Rose.

The queens look good enough to eat in this episode where they're challenged to find fashion inspiration from the world of cakes. RuPaul is joined by extra special guest judges actress Eliza Dushku & Sara Rue.

The queens perform stand-up comedy routines in front of a live studio audience. RuPaul is joined by extra special guest judges comedienne Rita Rudner and MADTV's Arden Myrin.

Get ready for a red, white, and blue spectacular! In this patriotic challenge, the queens are tasked with creating heartfelt and hilarious video messages to uplift our troops. RuPaul is joined by extra special guest judges Cheryl Tiegs and Johnny Weir.

The dolls record a single and perform before a live audience. RuPaul is joined by extra special guest judges Jody Watley & Carmen Electra.

The queens wig out when they have to compete in a fantasy hair show. RuPaul is joined by extra special guest judges American Idol Fantasia Barrino & comedian-TV host Wayne Brady.

The queens must transform a group of All-American straight jocks into their drag sisters. RuPaul is joined by extra special guest judges Sharon Osbourne & Margaret Cho.

The dolls break the bank as they perform in a pageant of dresses made out of money. RuPaul is joined by extra special guest judges LaToya Jackson & author-TV host Gigi Levangie Grazer.

Take a look back at the highlights, low-lights and previously unseen footage from the first 12 episodes as we race toward the climactic grand finale!

The remaining three queens face their final challenge when they're asked to transform into video vixens for the music video to Ru's latest single, "Champion."

The queens get together to spill the tea one more time.