'Barbie' Fans Outraged That 'Barbie Girl' Song is MIA From Movie Trailer

You'd think Barbie fans would be more than satisfied with the latest trailer for the Margot Robbie flick ... but some have a serious question for those who worked on the movie -- where's the freakin' Aqua song?!?!

That's right, fans are scratching their heads at this week's new look at Warner Brothers' "Barbie" -- with many calling the absence of Aqua's "Barbie Girl" a HUGE missed opportunity.

Check out the responses to the missing 1997 hit ... one says it'll be heartbreaking if the song doesn't make the cut.

Another fan points out, the trailer starts with Ken, played by Ryan Gosling, shouting out "Hi Barbie!" ... with Margot responding, "Hi Ken!" ... just like in the Aqua track.

When the movie was first announced, Ulrich Møller-Jørgensen -- manager for Aqua lead singer Lene Nystrøm -- said the track wouldn't be used but never explained why.

Of course, there's been a legal battle between Mattel and Aqua. The toy company filed suit against MCA Records back in 1997 for distributing the track -- Mattel was concerned it would hurt the brand. Aqua came out victorious in the end.

Even Barbie is controversial these days ... jeez.