The pair showed some sweet PDA at Stefani's big bash celebrating her son Zuma's eighth birthday on Sunday, and wasn't shy about sharing the love with their fans. In one particularly squeal-worthy Snapchat shared by the No Doubt frontwoman, Shelton gives her a big kiss on the cheek.
The former Voice colleagues also spent time together on Saturday night, when they performed their duet "Go Ahead and Break My Heart" at the star-studded charity event, Apollo in the Hamptons, at The Creeks in New York. Stefani and Shelton couldn't look happier snuggled up at dinner, where they were joined by Pharrell Williams, Jennifer Lopez, Katie Holmes, Ciara, and Jon Bon Jovi.
Watch the video below for more on the celeb-packed fundraiser.