The results of a post-mortem examination on a man who had measles when he died were "inconclusive", Swansea Coroner's Office has said.
An inquest into Gareth Colfer-Williams' death is due to be opened next Tuesday.
Public Health Wales said last week that initial tests showed he had measles when he died, but that it was not confirmed if measles was the cause of his death.
83 people have now been hospitalised since the outbreak started, but Mr Colfer-Williams is the only suspected death.
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The star celebrates beating Justin Bieber into second place as her song becomes a hit again after a performance at the total solar eclipse.
Later in the night cloud will thicken bringing hill fog, mist and some patchy drizzle by the early hours.
The Welsh singer sang her infamous track during yesterday's solar eclipse.