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Stefani also included a video of Shelton getting acquainted with a friendly sea lion at a visit to a Chicago aquarium.

\"Thank u shedd aquarium Chicago for an amazing unexpected b day tour!!!\" she added in the caption of the post.

Stefani spoke about her close relationship with Shelton to \"Good Morning America\" in June 2018.

\"He's my homeboy. He's my homey. He's just really an amazing all-around human so I feel so grateful for that,\" she said.

View this post on Instagram

A post shared by Gwen Stefani (@gwenstefani) on Apr 25, 2019 at 10:34am PDT

\"I celebrate him in the show!\" she said of her \"Just A Girl\" Las Vegas residency. \"He's inspired me so much. He's changed my life.\"

Stefani's Vegas residency runs until November.

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