Anita Baker is celebrating her birthday by sharing news of her return to the stage. The Detroit R&B singer took to Twitter on Wednesday to announce a new Las Vegas engagement in May. Baker, who signed the tweet “ABXO,” did not elaborate on the details. The “Sweet Love” singer played a five-show residency at the Venetian Theatre in Las Vegas in May and June 2019 as part of her Farewell Concert Series. Baker has recently been teasing a return to Vegas as well as new music on her Twitter, along with a new deal with Rhino Records. That partnership came after she publicly fought with with her forme…