Blake Shelton and friends Gwen's son celebrate birthday (Snapchat Story)

Blake Shelton helps Gwen Stefani's son celebrate his 8th birthday
Gwen Stefani and Blake Shelton pack on the PDA at Hamptons show... before continuing at son Zuma's birthday
Whether at work or at play — Gwen Stefani and Blake Shelton cannot seem to keep their hands off each other.
The couple put on a PDA-packed performance during a celeb-stuffed charity event, Apollo in the Hamptons, at The Creeks in New York on Saturday night.
Gwen was set to play the fundraiser for Harlem theater's youth programs alone, when her 40-year-old boyfriend surprised everyone by jumping up on stage.
The duo performed the song they co-wrote Go Ahead and Break My Heart, and never took their eyes off each other the whole time.
The country star eventually reluctantly left her side, but didn't let her go without a hug and a kiss.
And he didn't go very far either, sitting right at the front of the stage for the remainder of her performance, hollering his support.
The 46-year-old belted out some of her greatest solo and No Doubt era hits, including Don't speak and Keep on Dancing.
She even brought out their fellow Voice coach Pharrell Williams to perform Hollaback Girl with her.
According to People, Blake recruited Jennifer Lopez do dance with him at one point.
'The tall guy stood up first – good job, Blake,' Gwen praised from the stage.
The Gwen and Blake show wasn't the only performance of the night - Jon Bon Jovi, Lionel Richie and Ciara were just some of the megastars who also got behind the mic.
J-Lo wasn't the only celeb watching the display either - Jack Nicholson, Katie Holmes, John McEnroe, Don Johnson and Colin Powell got their hands on tickets.
On Sunday the lovebirds had another date - at Gwen's middle son Zum'a eighth birthday party.
The singer shared dozens of Snapchats from the Lego themed shindig, which featured a Lego brick pinata filled with Lego brick candies.
Blake was spotted in one puckering up to plant one on the blonde beauty's cheek.
Stefani's ex husband Gavin Rossdale, who is also father to her other boys Kingston, ten, and two-year-old Apollo, did not appear to be there for his son's party.
The former couple were married for 13 years until Gwen filed for divorce last year, amid allegations the Bush frontman had cheated with the children's nanny.
Gwen and Blake announced their relationship in November.