AceShowbiz -

Gwen Stefani had quality time with her parents and kids on Saturday, June 11. The "Hollaback Girl" singer celebrated her parents' 50th anniversary at Knott's Berry Farm in Buena Park in California.

The group celebrated the singer's parents Dennis Stefani and Patti Flynn's new milestone with a private party complete with a three-tier cake covered in white fondant and topped with wedding bells. Blake Shelton's girlfriend shared the happiness by posting some photos and videos on Snapchat.

Foto kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 6:02 PDT

Gwen, who wore a tartan shirt atop a black inner, uploaded a photo of herself standing side by side with her parents. "Congrats 50 years married!!!!" read the words across the picture. She also shared a photo of their parents locking lips and an image of the wedding-style cake.

Foto kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 5:51 PDT

Foto kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 5:51 PDT

Following the bash, Gwen and her children Apollo, Kingston and Zuma enjoyed some roller coaster rides. The singer, who wore black jeans and a black T-shirt underneath a red-and-pink flannel jacket, also played 3D gun games at the amusement park.

Foto kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 7:23 PDT

Video kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 7:23 PDT

Foto kiriman Gwen Stefani Snapchats (@gwensnapchats) pada Jun 11, 2016 pada 7:49 PDT

For those who wondered why Gwen's beau Blake was absent at the party, he was at the CMA Music Festival in Nashville, Tennessee on the same day. Thus, he was unable to join them for the celebration.