Ashlee Simpson admits her boyfriend was about Lindsay Lohan and Wilmer Valderrama

Ashlee Simpson-Ross puts on a long-standing debate – her "Boyfriend" tube really was about Lindsay Lohan.

Simpson, 33, spilled the beans on Watch what happens live as she played "Plead the Fifth" by Andy Cohen.

Cohen asked, "In your 2005 song 'Boyfriend', there were rumors that the lyrics 'I did not steal your boyfriend', that this word was allegedly about you not stealing Wilmer Valderrama from Lindsay Lohan. Is this true and how would you characterize your relationship with Lindsay?

"I think I know the answer," said Evan Ross, Simpson's husband, jokingly.

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"I mean, I dragged on with [Valderrama] first, and I was not interested in him at that time. And we are great! All is well. By the way, they are the best, "replied Simpson.

When Cohen asked the question again, Simpson said, "I do not [steal Valderrama]. I had finished. But all the love here. "

She also revealed that on a scale of 1 to 10, her surprise about the split of Sister Jessica Simpson with Nick Lachey had enrolled at five.

In August 2005, Simpson spoke a little about the real meaning of "boyfriend".

"It's not about a particular person. It's just something that every girl can understand … [how] every girl sometimes thinks you stole her boyfriend. It's just making fun of it, "Simpson told the 2005 Teen Choice Awards, according to MTV News.

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In October 2005, Valderrama opened to people about the two women. Valderrama, 38, said of Lohan, 32: "Everyone has evolved very well. I really wish her love too because I really think she can use it.

Lohan and Valderrama were identified for the first time in May 2004, and PEOPLE indicated that they left in November 2004.

Ashlee Simpson; Wilmer Valderrama; Lindsay Lohan

George Pimentel / Getty; Rob Kim / Getty; Danny Martindale / WireImage

Valderrama added Simpson: "We have been friends for about five and a half years. Suddenly, we could not be in the same room before people said we were going out.

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At the time, Valderrama refuted public perception of him. "A lot of people are there to make me look like this womanizer," he told PEOPLE. "The press has created this single character, but it's not really me. Hey, I take it as a compliment. This must be the first time in history that a sidekick on a show has this kind of off-screen character. "