Singer has chest infection and plans to reschedule shows for later in 2014
Teenage singer poses for a picture with Kansas City Royals veteran George Brett in Las Vegas
In a series of tweets, which have since been deleted, the singer also asks audience members to wear rainbow colors in support of gay rights
US singer covered Number One hit during recent Auckland show
The song is taken from the producer's forthcoming EP
The New Zealand born singer's manager says she will play 16 dates stateside
Pop star also performs cover of Son Lux's 'Easy' at Auckland event
The 17-year-old singer takes to Twitter to vent her anger following double Grammy Awards victory
The 17-year-old singer has spoken out about her fellow Grammys nominees
The 17-year-old singer is against fans calling themselves ‘The Disciples’