As of my last update in January 2022, I don't have any information about Megan Fox and Machine Gun Kelly's breakup in relation to red outfits.

 It's important to note that rumors and speculation regarding celebrity relationships can frequently surface in the media, often without substantial evidence or accuracy.

Megan Fox and Machine Gun Kelly, known for their high-profile relationship, have frequently made headlines due to their public appearances and shared moments on social media.

Their bold fashion choices and penchant for making statements through their styles have often garnered attention and speculation from fans and the media.

However, it's crucial to approach rumors with caution, especially when they're based solely on the colors or types of outfits worn by celebrities.

 Fashion choices alone typically do not serve as concrete evidence for relationship status or rumors of a breakup.