Rihanna gets physical on singles chart.

Album sales remain rangebound just above the 2m mark for the fourth week in a row, while singles recover slightly, thanks largely to the physical release of the Rihanna and Jay-Z collaboration, Umbrella.

Album sales have only fallen below the 2m mark a handful of times since 2000, but continue to flirt with the psychologically important barrier. Their recent decline has been very slow, however, with sales falling less than 1% in each of the last three frames. They drifted just 0.1% last week to 2,017,144 - but that is exactly 162,000 (7.44%) below their same-week sales of 2,179,144 in 2006.

The biggest-selling album, for the second week in a row, was Maroon 5's It Won't Be Soon Before Long, with 39,862 takers. That's the fourth lowest tally to secure the number one slot in the past 20 weeks, but still nearly 50% more than the 26,663 copies Linkin Park's Minutes To Midnight sold to remain in runners-up position.

Of nine debuts on the artist albums chart, The Pigeon Detectives have by far the most impressive, entering at number three with their first album, Wait For Me, and joining fellow Leeds band the Kaiser Chiefs in the Top 10. With current single Everything Is Average Nowadays attracting airplay, the Kaiser Chiefs' album ...