French actor Gerard Depardieu and Italian actress Ornella Muti joined other stars in Grozny for the 36th birthday of Chechen leader Ramzan Kadyrov.
The lineup for Friday's show also included former British dance star Craig David and one-hit wonders Steve Edwards and Ingrid.
Human rights groups, which accuse Kadyrov of grave rights abuses, criticized stars for performing at Kadyrov's birthday last year. Actress Hilary Swank apologized afterward.
(AP, MT)