She thought it was your basic, average … song.

“I didn’t think anything of it,” Milian tells EW.

But I didn’t know what it would become.

Kim Possible, Christina Milian

Kim Possible and ‘Kim Possible’ theme song performer Christina Milian.Disney; Inset: Aaron Poole/E! Entertainment/NBCU Photo Bank/NBCUniversal via Getty Images

Milian’s own record label didn’t even take the project seriously at first.

“But then itreallybecame a thing.”

“Call Me, Beep Me!”

“It was definitely of the time,” she jokes.

“People back then and even now still use it as a ringtone.”

She hums the iconic four beeps before adding, “It’s so catchy!”

But Milian still finds herself having to clear up some confusion.

“I’m not Kim Possible,” she says with a laugh.

“Sometimes people think that I am Kim Possible.

I’m only the theme song singer.

People are still surprised by that.”