WATCH: Amber Portwood Breaks Down In Tears From A MAJOR Surprise In A 'Teen Mom OG' Clip!

Grab a tissue!

In a sneak peek clip for Teen Mom OG, Amber Portwood received the surprise of a lifetime from her boyfriend Matt Baier. "What is going on," a suspicious Amber asks her pals while in the car. The reality star quickly realizes that there is a surprise party inside waiting for her!

"Amber, I got something for you," Matt shouts as Amber begins to greet her guests. "I got one more surprise for you!"

The birthday girl, left in complete shock, admits, "Oh my god, I am going to cry!"

Watch the clip above to see what Matt surprised Amber with! Teen Mom OG airs Monday nights at 10pm ET on MTV!