Pregnant Jenelle Evans shows off her new belly ring. Credit: Courtesy of Jenelle Evans; (inset)

What's a baby bump without some bling? At least, that seems to be Jenelle Evans' motto. The Teen Mom 2 star revealed she was pregnant with her second child in early December 2013, and on Jan. 20, she posted a photo of her "#PregnancyBellyring," which features a miniature "Baby on Board" sign. 

According to Parents Magazine, pregnant mothers have to be careful about belly button piercing during their pregnancy, because as the skin covering the belly begins to stretch, the area around the ring may become irritated, painful, and prone to infection.  

Evans' new jewelry appears to be plastic, with the tiny sign hanging off the end like a separate keychain. 

Evans' Teen Mom 2 costar Javi Marroquin (the husband of fellow Teen Mom Kailyn Lowry) tweeted about the new accessory first saying "lmfao," and when a follower told Evans that the new father was laughing at her, he quickly responded, "noooo the ring is actually pretty funny."

Evans, 21, revealed she has another belly ring that's "the pink birthstone for June," but that she and boyfriend Nathan Griffith won't know the child's gender until next week. 

The MTV star first rose to fame on season 2 of the reality series 16 and Pregnant, where she gave birth to her son Jace, who is the son of her ex-boyfriend Andrew Lewis

But Evans has struggled with drug addiction, relationship quarrels, and 10 arrests in the last three years, resulting in her mother, Barbara Evans, taking primary custody of 4-year-old Jace.