Teen Mom Catelynn Lowell may be squeaky clean on TV — but she's not as straightlaced you'd think. "She's definitely not as innocent as she seems," a source reveals to Star. While MTV keeps her vices under wraps on screen, the 19-year-old — who, along with fiancé Tyler Baltierra, famously gave up daughter Carly for adoption — "is very forthcoming about her partying lifestyle," explains the source.

From Anderson, Indiana to Hollywood, California, the Teen Mom cast soaked up the sun as they filmed the reunion show for season 3 and RadarOnline.com has the photos.

PHOTOS:  Amber Portwood & The Rest Of Teen Mom Cast Shoot Their Reunion Show

Amber Portwood, Tyler Baltierra and Catelynn Lowell all shots scenes at the trendy Redbury Hotel in the heart of Hollywood.

Portwood's own mother, Tonya, was in town to support her, despite previously blaming the reality show for her daughter's anger and violence problems.

PHOTOS:  Amber Portwood & Gary Shirley, Together Again

But there was nothing but love on set this time as Portwood was snapped giving her mom an affectionate kiss.

The young moms were all excited about the filming, taking to their Twitter pages to update their fans.

EXCLUSIVE PHOTOS:  Amber Portwood - Before She Was Famous

"In L.A. Its sooo nice here!" tweeted Tyler.

And while Portwood's baby daddy, Gary Shirley - who is also in L.A - wasn't part of Sunday's filming, he also tweeted, encouraging fans to tune in to the show on MTV.

PHOTOS:  Amber Portwood Leaves Jail

PHOTOS:  Amber Portwood & Gary Shirley Share Time With Daughter Leah

RELATED STORIES:

Amber Portwood Finds Love With Tattoo Artist

Amber Portwood Calls 911 Over Harassing Phone Calls

Amber Portwood Admits To Being 'Unfit Mom'

Teen Mom star Amber Portwood and her on-again/off-again boyfriend Gary Shirley just can’t keep their hands off each and local law enforcement are becoming a regular sight around the house as a result.

After coming under fire for smacking her baby-daddy Gary on national television, the tables turned on October 20 when Amber called police, claiming she was pushed out of her Indiana home by Gary while in her underwear!

READ THE POLICE REPORT

According to the police report obtained by RadarOnline.com, Madison County Sheriff Lt. Timothy Basey and Officer Adam Stephenson responded to the domestic disturbance incident in the early morning hours and quickly separated the couple to question them about the incident.

Gary explained to Lt. Basey that while the couple was watching a movie, Amber “got mad” when he received a text from a male friend but Amber thought it was from a girl!

Teen Mom’s Amber Portwood and Gary Shirley have officially split, RadarOnline.com has learned exclusively.
That’s what Amber’s dad Shawn Portwood told us in an exclusive interview about his controversial daughter. And he also added that Gary should share the blame for the controversial incident where Amber hit and kicked him, leading to a police and child services investigation.

“They don’t belong together. They just don’t mix. There’s not enough there,” Amber’s father, Shawn Portwood told RadarOnline.com.

PHOTOS: Teen Mom Amber At Water Park With Baby Daddy

Amber and Gary have endured several breakups and couple’s counseling and Amber drew national attention when she hit and kicked Gary on an episode of the MTV hit show.

It has been more than a year since fans watched MTV’s Teen Mom Catelynn Lowell and boyfriend Tyler Baltierra make the heartbreaking decision to give their daughter Carly up for adoption. Now, they are trying to move on and enjoy the lighter side of life. Catelynn opened up to RadarOnline.com about their current situation.

PHOTOS: Cutest Celebrity Kids

The two are working towards their high school diplomas, planning for college, and trying to enjoy life as normal teens. First on the agenda: celebrate Halloween.

PHOTOS: Hot Celeb Moms

“I’m going to be a cop, and Tyler is going to paint his face like a skeleton,” Catelynn told RadarOnline.com exclusively.

VIDEO: Teen Mom's Catelynn & Mother Brawl Over Putting Baby Up For Adoption

“My favorite candy is Kit Kat and Tyler’s is Fast Break, which is a candy similar to the Reese’s Peanut Butter Cup,” Catelynn added.

Catelynn and Tyler endured the pregnancy, adoption and some very painful family issues. Throughout, they have remained close and have not let life’s challenges get them down. They plan on having some fun this holiday.

EXCLUSIVE VIDEO BLOG: 16 And Pregnant Star Tried To Hide Her Baby Bump

“I love Halloween,” Catelynn said. While the other Teen Moms will be out Trick-a-Treating with toddlers, Catelynn and Tyler will be spending their Halloween like most teenagers.

“We’re going to chill with friends.”

RELATED STORIES:

EXCLUSIVE PHOTOS: Maci's Life As A Teen Mom

EXCLUSIVE PHOTOS: See New Pics Of Teen Mom Farra

VIDEO: There's No Shortage Of Drama On Teen Mom