Long awaited album will only be available through streaming platform for one week
New album 'Anti' is rumoured to be released this week
Drake collaboration 'Work' expected on Wednesday
Could work on album number eight be complete?
'Anti' will be the singer's eighth studio effort
Bajan pop-star took four songs from Sia earlier this month
The Weeknd and Big Sean will support in London, Manchester, Glasgow, Coventry, Cardiff, Sunderland and Dublin in June 2016
Singer's eighth studio record believed to be due on Friday (November 27)
Singer is believed to be close to finishing her eighth studio album
Pop star was expected to perform at event next week