No permission from Tina Turner
The poster features the show’s actress Dorothea Fletcher, who looks just like Turner. Turner did not permit the use of her portrait.
According to the Court, the use of look-alikes in advertising a tribute show falls under the artistic freedom of the producer. The only difference in the scenario would be if the show gave a false impression that the real Tina Turner supports or is involved. But that’s not the case here.