Adele's mobile app has been downloaded 1.5m times

"Adele is closing in on 20m sales of her album 21, but the British singer has also been a big hit on Apple and Google's app stores.
The official Adele app has been downloaded more than 1.5m times on iPhone and Android, according to David Emery, head of marketing at Beggars Group, the parent company of Adele's label XL Recordings.
[...]
In terms of features, Adele's app is fairly standard – news, photos, videos, song previews and tour dates, as well as a social section for comments and photo postings.
Emery says the aim was less about selling more music and tickets, than to provide "another communication platform" for Adele's fans, sitting alongside her own website, Facebook and Twitter."

Source:  The Guardian, 7th March 2012