by Zach Seemayer 10:04 PM PDT, July 16, 2017

Blake Shelton took girlfriend Gwen Stefani and her three sons on a fun fishing adventure on Sunday.

The 47-year-old songstress donned a low-key grey sweater and a red and white ball cap -- which complimented her fire engine red lipstick -- for the fun family day on the lake.

Stefani took to social media to share a few pics from the outing, as well as a videos of her 11-year-old son, Kingston, and 8-year-old son, Zuma, reeling in some fish.

Family adventures on a Sunday morning 🎣 _ _ #gwenstefani #gwen #stefani #gx #shefani #blakeshelton #blakeandgwen #gwenandblake #kingstonrossdale #zumarossdale #family #sunday #fun #boat #fishing #laketexoma #oklahoma #sunrise #beautiful #fashion #style #kids

A post shared by #SHEFANI (@loveforgwen) on Jul 16, 2017 at 9:23am PDT

PHOTOS: Celebs Share Pics of Their Cute Kids

The No Doubt frontwoman also shared a beautiful snapshot of her boyfriend sitting in the captain's chair of their fishing boat as he stared out over the lake at toward the rising sun.

Photo: Snapchat

The mother of three shares Kingston, Zuma and 3-year-old son Apollo with ex-husband Gavin Rossdale -- and Shelton quickly become part of the family, spending time with the boys at his ranch in Tishomingo, Oklahoma.

WATCH: Gwen Stefani Shares Sweet Pics of Her 'Summer Love' Blake Shelton

Back in June, Shelton celebrated his 41st birthday with Stefani and her adorable family, which the singer documented with some super cute snapshots.

Check out the video below for a look at Shelton's fun b-day festivities, including his super cool armadillo cake!

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