NASHVILLE, Tenn. (AP) — Miranda Lambert was all smiles last night, as she jumped on stage and sang at a small club in Nashville. Her appearance came just two days after announcing her divorce from Blake Shelton. Last night, she joined her friend Ashley Monroe in singing, “Heart Like Mine,” which she co-wrote with Monroe. The show was a preview of Monroe’s upcoming album, “The Blade.” Country artists including Vince Gill and Phillip Sweet of Little Big Town were also in the small club. Lambert spent most of the evening singing along from the crowd, until Monroe invited her up for the encore.