Coldplay is a solo rock performer.
Coldplay . Will Champion joined as drummer and backing vocalist , completing the lineup . In October 2011 , Coldplay released their fifth studio album , Mylo Xyloto , which topped the charts in over 34 countries and was the UK 's best-selling rock album of 2011 , but received mixed reviews , In May 2014 , they released their sixth album , Ghost Stories , which also received mixed reviews and topped the iTunes Store albums charts in over 100 countries . `` Yellow '' is a song by British rock band Coldplay .