On 2 April, over 2100 metres on better ground at the same track she started at odds of 5/1 for the Listed Prix Durban in which she was ridden by Maxime Guyon and won by three quarters of a length from Palombe.

[9] On 18 June at Chantilly Racecourse Sistercharlie was stepped up to Group 1 class for the Prix de Diane over 2100 metres and started at odds of 12.1/1 in a sixteen-runner field.

Ridden by Boudot she was repeatedly blocked as she attempted to make progress in the straight but finished strongly to take second place, a length behind the winner Senga.

Ridden by John Velasquez she started the 7/4 favourite but was beaten a neck into second by the Breeders' Cup Juvenile Fillies Turf winner New Money Honey.

She began her third campaign in the Grade I Jenny Wiley Stakes over 8+1⁄2 furlongs at Keeneland Racecourse on 14 April and was made the 3.4/1 second choice in the betting behind the Argentinian mare Donna Bruja.

[10] At Belmont Park on 8 June Sistercharlie started odds-on favourite for the New York Stakes but was beaten a head by Fourstar Crook, to whom she was conceding two pounds in weight.

Sistercharlie was restrained towards the rear before producing her customary late run on the outside, taking the lead inside the final furlong and winning by half a length from Fourstar Crook.

[15] On 3 November Sistercharlie contested the 20th running of the Breeders' Cup Filly & Mare Turf over eleven furlongs at Churchill Downs and started at odds of 5/1 in a fourteen-runner field.

After racing in mid-division as A Raving Beauty set the pace, Sistercharlie moved upon the outside approaching the final turn before launching her challenge in the straight.