Wedding planning has Selena Gomez in a frenzy and the stressed-out bridezilla is driving pals batty with her endless list of diva demands, RadarOnline.com can reveal.

The star-studded nuptials are set for September in the hoity-toity California town of Montecito, and her fiancé, record producer Benny Blanco , is struggling to keep her calm and focused, sources revealed. Article continues below advertisement

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"Selena wants everything to be perfect, but she keeps changing her mind about details, even things that seem trivial," shared an insider.

According to a source, the guest list alone has the 33-year-old former Disney star turned Rare Beauty makeup mogul in a tizzy

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