987,000 copies sold in the first week of sales.
More than 300,000 people bought the first single from the worlds biggest boyband, JLS
Eminem had 1.760.000 first-week album sales(album : The Marshall Mathers LP)
The Stepbrothers Had One of the Best Sales on Its First Week, It Had About $47,000,000 on First Week and Continued to $25,000,000 on Second Week and About $13,000,000 on Third Week.
496,000 in the first week
Well, I'm not sure about a single artist, but most album sales sold in a week by any musician would be NSYNC's No Strings Attached with 2.4 million copies in its first week.
238,000
It sold over 15 million copies worldwide. It was released on May 14, 2007. In US, it sold 623000 copies in first week, making it the biggest first week sales of 2007 at the time.
Moses this season on the grey team lost 41lbs in week one, that's the most ever lost by a single person in a week.
476,000 copies
MW3 is short for the Call of Duty Modern Warfare 3. It is a game than was released on November 8 2011 and sold over 12 million units during the first week of sales and set the new records for single day sales and release week sales. Both earlier records were from Call of Duty Black Ops
SINGLES: What Makes You Beautiful was 1D's first hit, released 11th September. It entered the UK singles chart at #1 with first week sales of 153,965. By December it had sold 484,000 copies in the UK. Then they released their second single Gotta Be You on the 13th November. ALBUMS: Their debut album, Up All Night, became the fastest-selling debut album on the UK Albums Chart of 2011, selling 138,631 copies in the first week. On the 16th December it was confirmed that the album was the 27th biggest selling album of 2011 with only 3 weeks of sales.