I turned my head for one second and he's taken again!  Randy Houser is engaged to an Australian woman named Tatiana Starzynski.

She's the sister-in-law of his buddy Dallas Davidson, who cowrote Randy's hit "Runnin' Outta Moonlight".

The couple started dating earlier this year but kept it very low key.  That's pretty much how he rolls in his private life.

You may remember last year when he waited months before telling everyone that he filed for divorce from singer Jessa Lee Yantz. They have a 3 year old, West, together.

Randy is 39, Tatiana's only 21.  There's no word on a wedding date.

Congrats to the happy couple!  Must be she like "Like a Cowboy" as much as we did!

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Mike Coppola, Getty Images