It's a wrap on this season of Teen Mom OG -- and like on past installments of the long-running series, Maci, Farrah, Amber and Catelynn endured a gamut of emotions (some exciting and some excruciating). In short, we had a wedding, co-parenting ups and downs, new businesses, fiery feuds and much, much more.

But which circumstance stood out among the rest and took the biggest-moment crown? Revisit some major incidents -- including one particularly monumental scene from tonight's double episode featuring Sophia's mother and TMOG producer Larry exchanging some heated words -- share your picks for the top finisher in the comments, and be sure to catch Part 1 of the Teen Mom OG reunion next Monday at 10/9c!

Catelynn

It was a day more than 10 years in the making: The high school sweethearts became husband and wife (unbelievable vows and all -- relive them above). The Michigan mama also experienced other milestone events: a bachelorette party, a romantic Hawaiian honeymoon and her daughter Novalee's first birthday bash.

Farrah

The 24-year-old certainly had some sweet highs -- like reuniting with her daughter after a lengthy business trip and looking forward to a fresh start in California. But Farrah experienced some unforgettable fights with her on-again, off-again, on-again boyfriend Simon as well as her mother Debra. But perhaps the spat (seen above) that takes the cake was featured in the finale -- and won't soon be forgotten.

Amber

The Indiana native embarked on a new professional venture (flipping houses with her fiancé Matt) and also began planning her nuptials. But her happiness was completely derailed when her ex Gary brought up claims about her partner's past (witness it above) -- specifically, that the New Englander is the father of seven children.

Maci

The Tennessean is now happily engaged to Taylor -- but the soon-to-be mother of three openly wondered why her longtime boyfriend had not yet popped the question at a particularly tense dinner (review it above). Maci also adjusted to life with Baby Jayde, helped Taylor launch his clothing line and experienced some breakthroughs with Bentley's father Ryan.