'Teen Mom' Season 4 Finale On Ustream: Where To Watch Catelynn Answers Questions Live

The series finale of "Teen Mom" is premiering on MTV Tuesday night, and the country will have to say goodbye to their favorite young mothers in a 90-minute episode.

(Click here to watch the live stream of the final episode of "Teen Mom," which begins at 10 p.m. EDT, 9 Central, on MTV.com's Ustream.)

What is going to happen to Butch and April? Will they finally get their lives straightened out? Lowell and her boyfriend will be there to answer all of the fan's questions.

Viewers who would like their questions answered can submit them to #TeenMom on Twitter or send them to the "Teen Mom" Facebook page.

The nation was introduced to Maci Bookout, Farrah Abraham, Amber Portwood and Catelynn Lowell in 2009 when they were pregnant teenagers on "16 and Pregnant" -- before anyone had any idea of how famous a teenage mother from Tennessee or Michigan could become.

All four girls made history as the world watched them struggle with walking around with their large bellies through the high school halls and deciding whether or not to keep their children. By continuing to appear on "Teen Mom" for four seasons they allowed the world to watch them grow up from scared girls to mature young women.

Lowell and her boyfriend Tyler Baltierra made the difficult decision to give their daughter up for adoption. With every day that Lowell's belly expanded, viewers watched her love for the child grow and the couple find the best parents for their daughter in a pure "Juno" fashion.

Viewers watched them struggle with debating whether or not they had made the right decision by giving their daughter Carly up for adoption.

Maci Bookout is arguably the most loved by "Teen Mom" fans. Though she was engaged to her son Bently's father for a short time, Bookout ended the volatile relationship and focused on raising her son. Fans are overjoyed with the mother that Bookout has become and are happy that she seems to be in a healthy relationship with Kyle King.

Farrah Abraham has been the most aloof "Teen Mom" on the show, never really opening up about her life or her daughter Sophia's father until the end of the series, but she also is the most successful mother of the "Teen Mom" group with a book "My Teenage Dream Ended," culinary background and fashion career.

Unfortunately for Amber Portwood, motherhood has not suited her well. After being in and out of rehab and multiple arrests, the "Teen Mom" opted to go to jail for five years instead of getting sober in rehab. She recently granted her sometime boyfriend Gary Shirley full custody of their 4-year-old daughter Leah.

MTV has stated that the girls will remain in the "MTV family," do you think there will ever be plans for another show?

Tune in tonight on MTV's Ustream to watch the "Teen Mom" storybook close for good.