Machine Gun Kelly has shared another new track from his upcoming fifth studio album ‘Tickets To My Downfall’.Entitled ‘My Ex’s Best Friend’, the song hears MGK team up with singer-songwriter blackbear as they discuss a messy entanglement over a guitar-laden backdrop.The song opens with MGK singing: “You know my ex, so that makes it all feel complicated, yeah (It all seems complicated)/ I read those texts that you sent to yours, but I’ll never say it, yeah (I’ll never say).”On the chorus of the