The 36-year-old R&B star's 2003 hit Milkshake made it to number three in the U.S. Billboard Hot 100, and to number one in the U.K.

Despite her most successful record in the charts containing the lyrics, "My milkshake brings all the boys to the yard," Kelis says she's never actually made the dairy based thirst quencher, and instead prefers spinach smoothies.

"I don’t think I’ve ever made a milkshake," she tells British newspaper The Guardian. "I made a smoothie the other day that was really good – protein powder, spinach, orange, and crushed ice with a little bit of honey and coconut water."

Although she's never tried to make the beverage with which she's most commonly associated, Kelis is a culinary aficionado having trained as a professional chef and released her own cookbook.

The musician even named her 2014 album Food, featuring tracks titled Breakfast, Biscuits n' Gravy, Jerk Ribs and Friday Fish Fry.

Speaking about her love of food and its influence on the album she explains, "We recorded in this big house and the kitchen was right next to the studio. Some of the time it was just stuff I wanted to be eating. Sometimes it was stuff we actually were eating or cooking. It’s a celebration of food, really."

Although she loves cooking when at home, the star loves ditching comfort to go camping, "(When) I do a festival, in my mind, I’m camping. People are like: 'I like to camp.' Me too. I love it. I do it all the time."

However, the singer, who is playing several music festival dates across the U.K. this summer (16), had a terrible experience the first time she played at Britain's famous Glastonbury event.

"The first time I played Glastonbury, in 2000, it rained a lot," she recalls. "Moby was on stage before me, and there was a sewage situation. There was literally poo everywhere. It was revolting. I still had to perform in that funk."