Lily Allen is using Halloween to make another brutal dig after her breakup with David Harbour - this time, at his mistress! Perezcious readers know that the singer dropped a new album all about the actor's infidelity. On the record, there is a song called Madeline where Lily sings about David breaking the rules of their open marriage with this woman. We later found out that his mistress is Natalie Tippett, a costume designer who allegedly started an affair with the Stranger Things star while they worked on the 2021 Netflix film We Have A Ghost together.