2000: two-year-old season Superstar Leo began her racing career in a
maiden race at
Windsor in May, in which she led a
furlong out but was caught in the closing stages and beaten a head by Flying Millie. Two weeks later she recorded her first win at
Catterick. On this occasion she took the lead from the start, went several lengths clear, and was then eased down in the closing stages to win by three quarters of a
length. A week later she returned to the same course and won again, pulling clear inside the last furlong to win by five lengths. Superstar Leo was then sent to
Royal Ascot where she was moved up to
Group Three class for the
Norfolk Stakes. She was settled behind the leaders by
Richard Quinn and sent to the lead a furlong out. She quickened well and won by one and three quarter lengths from Bouncing Bowdler. Haggas commented that she had won "a bit easily" after her connections received an offer that was reportedly "too good to refuse". Michael Hills held Superstar Leo up in the early stages before making a challenge in the last quarter mile. The filly took the lead and went clear, being driven out by Hills to win by three and a half lengths with Romantic Myth sixth. The winning time of 59.19 broke the track record by over a second. who won by five lengths, but finished second of the ten runners. She was returned to five furlongs for her next race, the
Flying Childers Stakes at
Doncaster. She was made 2/1 favourite and led all the way to win the Group Two race by three-quarters of a length. Haggas paid tribute to the filly afterwards saying, "horses like her come around only rarely and we're very lucky to have her." Haggas called her performance "a fantastic run" and added that he was "absolutely thrilled" with the filly.
2001: three-year-old season As a three-year-old, Superstar Leo failed to recapture he two-year-old form. She was unplaced behind
Cassandra Go in the
Temple Stakes (a "credtable" run according to the
Telegraph) and the
King's Stand Stakes, before being dropped down to
Listed level to finish second in a race at
Chester in July. A week later she finished fourth to
Invincible Spirit in the Listed
Hackwood Stakes before ending her career by running unplaced in the
King George Stakes at
Goodwood. In August it was announced that she would be retired to stud. ==Race record==