United Kingdom, June 19 -- Ashlee Simpson says Diana Ross is "so hands on" as a grandmother.

The 40-year-old singer and reality star married the iconic musician's son Evan in 2014, and she has opened up about how the Chain Reaction hitmaker acts around her grandchildren.

Asked how she is as a grandmother, Ashlee told E! News: "The best one! So hands on, and you wouldn't think of it like that. She's just about family."

The loved up couple have kids Jagger Snow, eight, and Ziggy Blu, three, together, while the singer has son Bronx Mowgli, 15, from her previous marriage to Pete Wentz.

Ashlee recently announced plans for a Las Vegas show, and she admitted she could be raiding Diana's closet for outfits.

She quipped: "I would love to stea...