Ashlee Simpson Rossis putting a years-old debate to bed — her hit “Boyfriend” reallywasaboutLindsay Lohan.
Simpson Ross, 33, spilled the beans onWatch What Happens Liveas she playedAndy Cohen‘s“Plead the Fifth.”
Cohen asked, “In your 2005 song ‘Boyfriend,’ there were rumors that the lyrics ‘I didn’t steal your boyfriend,’ that that lyric was allegedly about you not stealingWilmer Valderramafrom Lindsay Lohan. Is that true, and how would you characterize your relationship with Lindsay?”
“I think I know the answer,” her husbandEvan Ross, interjected jokingly.
“I mean, I hung out with [Valderrama] first, and I wasn’t interested in him at that point. And we’re great! All is well. By the way, they’re the best,” Simpson Ross replied.
When Cohen posed the question again, Simpson Ross said, “I didn’t [steal Valderrama]. I was done. But all love here.”
She also revealed that, on a scale of one to 10, her surprise about sisterJessica Simpson‘ssplitwithNick Lacheyregistered as a five.
In August 2005, Simpson Rosswas a bit coyerabout the real meaning of “Boyfriend.”
In October 2005, Valderrama opened up to PEOPLE about both women. Valderrama, 38, said of Lohan, 32, “Everyone has moved on just fine. I really wish her love too because I really think she can use some.”
Lohan and Valderrama were first spotted together in May 2004, and PEOPLE reported that theyhad called it quitsin November 2004.
George Pimentel/Getty; Rob Kim/Getty; Danny Martindale/WireImage

Valderrama added of Simpson Ross, “We’ve been friends for about 5½ years. All of a sudden we couldn’t be in the same room before people were saying we were making out.”
At the time, Valderrama refuted the public’s perception of him. “A lot of people are out to make me look like this womanizer,” he said to PEOPLE. “The press has created this bachelor persona, but it’s not really me. Hey, I take it as a compliment. It must be the first time in history where a sidekick on a show has this kind of persona offscreen.”
source: people.com