The gamer, who has a strong following on YouTube, has now not been seen for five days.
Host Ken Bruce resorted for the first time to flipping a coin after two competitors tied on points.
The YouTuber promises to refund all customers, including Alexandra, who got her make-up lab tested.
Fake messages could cause widespread panic, the researchers who uncovered the flaws say.
The pop star met the pair after a video of them singing her song Dancing to their dying mum went viral.
Several prominent bands and musicians take action after learning a fire destroyed their music.
Lax security at a Nasa lab let a hacker lurk on the agency's network for almost a year, says report.
The mobile network sent 2.5 million messages to customers about its app and handset upgrades.
The pop star surprised the girls by joining them in a rendition of their late mother's favourite song.
Fourth film in the long-running franchise takes $238m (£187m) but underperforms at the US box office.