The Eurythmics star, 62, said his “locker room talk” acted as a “catalyst” for many women, as she took part in an event in London ahead of International Women’s Day.
Comments made by Mr Trump in a 2005 leaked video in which he bragged about grabbing women “by the pussy” made global headlines during the US presidential campaign.
Lennox told the Press Association: “In a weird kind of way that kind of event that happened actually catalysed the issue for a lot of girls and women in a particular way that became very strong.
“All of a sudden there were a lot of people putting on pink pussy hats and saying no.
“It actually became very real for them, because when someone says ‘It’s just locker room talk’, actually don’t we think it’s time that we should address that particularly if they’re the leading representative of one of the biggest most influential countries in the world?
“So that made women very angry, that made the issue very clear for them.
“But actually what we’re saying is that the issue is huge, looking at the developing world, that is just the tip of the iceberg.
“So there’s so much more to address. We’ve been banging this drum for a long, long time. I welcome anybody that comes here, men and women.
“So in a funny way, the Donald Trump statement is almost helpful as a catalyst.”
Lennox is among a host of campaigners at the CARE International rally and march which aims to shine a light on the inequality faced by women and girls around the world.