The American Pie star, 36, met the 20-year-old singers in the Celebrity Big Brother house last year and told The Daily Mirror they are still the best of friends.
"I had such a great time with them in the house and I still meet up with them.
"They are so much smarter than people give them credit for and they know exactly what they're doing.
"We hang out, talk about life and listen to their new songs and lyrics. We are just regular friends. I am just like a mentor to them.
"I have already been in a video with the boys and they bought me this necklace to say thanks."
The actress also denied reports that she married Danish businessman Michael Lillelund and then Bulgarian financier Zachary Kehayov.
She said: "No I am not married. I am single at the moment and happy.
"I don't think I have met my ideal man yet. Sometimes you think you have, but I don't think you know until you really know. I haven't given up on that, but I haven't found the one."