Be The Band: Sia’s performance tugs on heartstrings! Updated Aug. 6, 2015, midnight | By Sign up: Newsletter Share this: Whatsapp Logo Pop and RnB lover Sia delivered a sultry rendition of Rihanna’s Diamonds. Sky says it’s Sia all the way because, “the pipes on this one are strong baba.” The 21-year-old feels he’s ready to wow Durban! Show's Stories