WEDDING bells are set to ring for TINA TURNER!

After more than 25 years together, the “Proud Mary” singer will marry beau Erwin Bach on July 15 in Switzerland, a source tells The ENQUIRER.

Tina, 73, met Bach, 57, while he was an executive at her record label. They’ve been dating since 1987 and have lived in Switzerland since 1995.

They’ll say “I DO” at their chateau on the shore of Lake Zurich, and the bride will wear an Armani gown that she chose during a June trip to Milan, says an insider.

Wedding guests, including designer Giorgio Armani, have reportedly been asked to wear white. The reception will be catered by chefs from the bride’s favorite Zurich restaurant.

It’s the second marriage for the eight-time Grammy winner, who was born Anna Mae Bullock in Nutbush, Tenn. She divorced her first husband, Ike Turner, following years of abuse. He died in 2007 of an accidental cocaine overdose.

The wedding comes after the ageless “What’s Love Got to Do With It” singer outraged many fans in January by announcing that she’s giving up her U.S. passport to become a Swiss citizen.

Her rep later clarified that she’ll be “giving back” her U.S. citizenship.

“I’m very happy in Switzerland and I feel at home here,” Tina said. “I cannot imagine a better place to live.”