Two days after she and Blake Shelton announced the end of their four-year marriage, country star Miranda Lambert made her first public appearance since the news with a performance at a club in Nashville, Tennessee.

The Associated Press said Lambert, 31, joined her friend, singer Ashley Monroe, 28, Wednesday night at The Basement East for a duet of "Heart Like Mine," a song they co-wrote.

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Fellow country singers Phillip Sweet, of the band Little Big Town, and Vince Gill also were on hand for the show, a preview of Monroe's upcoming album "The Blade."

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Grammy Award-winning Lambert and fellow country star Shelton, 39, announced on Monday they were divorcing.