So let's start with Robert Orton. Few weeks after he began his freelance career, quite unknown New York singer contacted him and soon the whole album + one single were waiting on his desk. The single was ... Lady Gaga - Just Dance.
[...] I don’t find sample rate that important. Most of the stuff I do ends up on MP3, so whatever sample rate I use doesn’t make a big difference. I used 44.1kHz/24-bit for ‘Just Dance’; 96k does sound great, but the large file sizes are a hassle: everything takes twice as long and it’s a pain to do backups. There are other factors that make a far bigger difference to the sound than just the sample rate, and I prefer to focus on them.
Article: Secrets Of The Mix Engineers: Robert Orton