This is from Digital Spy

Susan Boyle - UK Charts Susan Boyle failed to re-enter the UK Charts After her huge comeback on BGT last week and with over 12 million  people watching, her albums failed to make the top 100 http://www.officialcharts.com/albums-chart/ All other performers albums charted, apart from SuBo. This is huge drop for her.

http://www.officialcharts.com/albums-chart/

http://forums.digitalspy.co.uk/showthread.php?t=1664984

A comment on this forum:

Having said that, looking on Wikipedia, the sales for her albums have deteriorated really badly.  Her 1st album sold 10 million worldwide, 1.8 million in the UK and 3.1 million in the US Her 2nd album sold 6.5 million worldwide, 583,000 in the UK and 3 million in the US Her 3rd album sold 1.5 million worldwide, 100,000 in the UK and 600,000 in the US She lost 8.5 million sales from her first to third albums!  Now those figures are quite worrying, I hope it gets better with her 4th album!