The 47-year-old charity campaigner launched a stinging attack on her ex-husband - who collaborated with the stars on 'FourFiveSeconds' and insisted people are not interested in him because the Beatles legend isn't relevant anymore.
After initially claiming it was ''boring'' to talk about Paul - who she divorced in 2006 after four years of marriage - Heather was pressed on the matter because ''people are interested'', and she replied: ''They're not [interested]. That's the thing. If I go down the street, all I get is kids coming up to me. Half of them don't even know who he is. That's why he's got to do songs with Rihanna and Kanye West, so people remember [who he is].''
''Most of the time I have people going, 'Oh my God, you're a ski racer' or 'You help the animals', I own the biggest vegan company in the world, most of the money I earn goes into helping animals, disabled kids, landmine clearing charities, things that are changing the world.''
And despite being one of the most famous musicians in the world, Heather dismissed her ex-husband - with who she has 11-year-old daughter Beatrice - as a normal guy who wrote ''a few cool songs''.
Speaking on Ireland's 'Late, Late Show', she added: ''This is just someone I fell in love with who to me was a normal guy who happened to write a few cool songs in the '60s and a few in the '70s.
''It was just someone I fell in love with, like everybody who is a partner. You fall in love, you get married, sometimes you wake up and think 'This is completely wrong' and you move on. There's a massive nation of people who are divorced.
I divorced someone I once loved and I was abused for it. If anybody put themselves in my position and went, 'How would I feel if the world was constantly saying ''What about that old baggage of yours?'''
''It's so boring.''
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