On the day of her 45th birthday, Beyonce is celebrating with a new version of a classic. Queen B’s newly-released 20th anniversary deluxe edition of her B’Day album contains a number of previously-unheard gems among its 31 cuts. But the one that is getting the most attention is a new version of “Irreplaceable,” which features previously-released vocals from Selena.The song, titled “Irreemplazable (Como La Flor),” is approved by the estate.