Despite the two calling off their engagement, Megan Fox was seen celebrating Machine Gun Kelly’s 34th birthday at his A-List-filled bash. The celebrity couple have had a rocky relationship over the past couple of years, and just last month, Megan Fox admitted they had ended their engagement. Although the Hollywood star wasn’t willing to explain the details, she did say she believes Machine Gun Kelly is “still her twin soul,” and it looks like the pair are still on great terms. Megan Fox and MGK pose together at his birthday – despite ending their engagement Machine Gun Kelly took to his Instag…