"No Doubt" singer Gwen Stefani's son Zuma, an aspiring country singer, is a lookalike to stepdad and ex-coach of "The Voice" Blake Shelton.

Gwen Stefani celebrated her "sweet and talented" middle son Zuma this week with a special post on social media. Zuma turned 17 on Thursday (Aug. 21), and the proud mom of three boys marked the occasion by sharing a series of photos and a video of her son strumming on a guitar and singing.

Gwen Stefani and Blake Shelton‘s marriage is reportedly on rocky grounds. A source exclusively told RadarOnline that the country star is leaning on friend Keith Urban for marriage advice after hitting a rough patch with his wife.