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Longest time spanning the US R&B album chart by a group

Longest time spanning the US R&B album chart by a group
Who
The Isley Brothers
Where
United States
When
May 2006
The longest span on the US R&B album chart by a group belongs to The Isley Brothers (USA), who topped the chart in May 2006 with Baby Makin’ Music, had their first US chart entry over 45 years earlier with Shout in September 1959.