The celebrity stylist - who appeared as a judge with the 50-year-old supermodel on 'Britain and Ireland's Next Top Model' - found it ''quite scary'' to sit alongside the stunning-blonde, whose ''sparkly'' physical presence often stole her attention.
She exclusively told BANG Showbiz: ''She's kind of physically - you're just taken aback. If you can be intimidated in a good way, she's like that, because, you know, she's so tall and such big hair and just a huge presence.
''You just want to stare at her and be like, 'Oh my god.' She's actually a living goddess. She's amazing. She's all kind of sparkly and gold. She's kind of like, superhuman.
''But you know she's very smart, she has a really strong, great team around her.''
She explained: ''So me, sitting next to her on a panel, just being like a normal girl, was kind of like, on a day to day basis, quite scary.
''Luckily I had an opinion. Because of my career I felt backed up by being able to feel confident.''
Meanwhile, following the birth of her son, Grace has designed her own post pregnancy style guide to provide practical and stylish wardrobe ideas and quick and easy fashion tips for other new mums.
The style guide is available for download from www.persilandcomfort.co.uk.
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