Harry Styles and the rest of One Direction members are reportedly having some conflict relating to their music choices, due to Styles's different opinion to take their music in a more rock direction, disregarding their pop music roots.

"Harry's dramatic plans are believed to have been hatched after hanging out with stars including The Rolling Stones, Elton John and Rod Stewart, who have urged him to take the next big step," a source claims. "Harry loves being in the band and respects and loves his band mates. But he's very ambitious and thinks they should be growing up more and becoming more credible."

"Their third album 'Midnight Memories' was already a lot less pop but Harry wants to push it further," the source continues.

It is quite true that the British band's latest album has strayed from their previous pop endeavors. With that being said, the insider also says that Styles "thinks their next album is the perfect time to create a much edgier and more rock 'n' roll image and he's already writing songs that he wants them to include on the record."

However, the source reveals that Niall Horan, Louis Tomlinson, Liam Payne and Zayne Malik "fear if Harry starts changing their style, he's going to take over the whole thing."

"Niall and Louis especially are worried about turning their backs on a pop sound and changing a winning formula," the source says. "The fear is that if Harry doesn't get his way, he could end up walking out and going solo. He doesn't want to be five years down the line and still doing boyish pop tunes."