Miranda Lambert had a rough weekend. The singer struggled to get through her set Friday night (July 29) in Tinley Park, Ill., especially while performing her emotional song "Over You."

People reports that while Lambert was singing her 2012 single "Over You" — which she co-wrote with ex-husband Blake Shelton — she broke down in tears. The audience had to help her finish the song. She and Shelton wrote the song together about Shelton's experience losing his older brother in a car accident when he was a teen.

Lambert told her audience earlier in the night that she was suffering with cramps and was feeling hormonal. "I told you I was a mess," she remarked. Later in her set, she began crying once again during a performance of the heartfelt "The House That Built Me."

The country superstar has gone through many ups and downs this year following her divorce from Shelton last summer. She recently released her new single "Vice," and in an Instagram post, details the difficulties of her year.

"The last year of my life has been one of heartache and healing, ... Of learning to be honest .... Accepting the flaws and celebrating the smiles. Finding peace in dark places ... having some moments alone with me. Facing fears and feelings... All of them," she writes. "I got to know my guitars...became friends with a pencil and paper ... Used melodies to lead me places I had never been.... Made music with my friends. Because music is medicine. This means the world to me. Thank you for joining me on this journey."

Lambert fans know that it's not uncommon for the singer to break down on stage — she frequently tears up while singing "The House That Built Me."

Miranda Nervously Sings "Vice" for the First Time