Talent Show has produced a Perth Cup upset, giving the jockey who helped start Black Caviar's winning streak an unlikely big-race win.

Jarrad Noske, who rode Black Caviar in her first two wins when on loan as an apprentice to trainer Peter Moody, produced a copybook ride to land Talent Show a $31 winner of the $500,000 feature.

In a race for only the strongest stayers because of a frantic tempo set by Cantonese and Lopov, its complexion changed quickly from the 200m as Talent Show burst through the middle to beat the favourite Mr Moet ($3.50) by three-quarters-of-a-length with Global Flirt ($11) a nose away third.

Cantonese finished 11th after Jim Cassidy took the Sydney stayer to the front 1600m from home.

Cassidy wanted Cantonese to free-wheel on his own terms but those plans were upset when Lopov disputed the eastern states visitor for the front.

At one stage they set up a 12-length break over the third-placed horse but their cut-throat tactics led to their downfall and they had little to offer in the straight.

Shamardashing, the only other interstate horse in the race, finished sixth after he was given a sweet run.

Talent Show, originally drawn as the first emergency, was an 11th hour inclusion in the Group Two race after the scratching of equal favourite Chester Road on Monday.

Tuesday's win was Talent Show's fifth in 30 starts but his first for almost 12 months.

Mr Moet, trying to add the Group Two race to his Railway Stakes and C B Cox Stakes successes during the summer carnival, settled with the tailenders.

He unleashed his trademark finish to be hailed the winner in the straight until Talent Show arrived on the scene.