Champion Serena's Song, North America's all-time leading female money- earner, produced an Unbridled colt Feb. 19 at Craig and Holly Bandoroff's Denali Stud near Paris, Ky. The colt was bred by Robert and Beverly Lewis, who campaigned Serena's Song to the tune of $3.2 million in earnings. Serena's Song is the dam of stakes winner Serena's Tune (by Mr. Prospector) and stakes-placed Sophisticat (by Storm Cat). She is booked to Storm Cat.A month before the foaling, another of the Lewisies' stakes-winning broodmares, Storm Beauty, produced a Kingmambo colt at Denali. Storm Beauty, a half-sister to champion sprinter Gold Beauty, is booked to A.P. Indy.