There's no doubt Rihanna shined bright like a diamond as she kicked off her world tour with stunning sexy outfits! Click on the slideshow to take a peak of the star's concert wardrobe.

The 25-year-old star began her massive 27-city tour on March 8 in Buffalo, New York. She rocked the stage in multiple costume changes, busting out in a striking pink-and-white bustier matched with pink-and-neon leggings, a sheer black top with white heeled boots, a red halter and wrap-around skirt exposing her mid-section, and a long sheer blouse complemented with studded thigh-high boots.

More than that, Rihanna ensured that all are eyes were on her as she donned a sparkly $1-patterned doll-like dress with matching high tops, a definite scene-stealer.

Designer Adam Selman is the genius behind her clothes, who also collaborated with the singer on her River Island collection which was just launched in London.

"Her body is so insane," Selman told the New York Times. "It's the dream body to make clothes for. You don't have to try as hard."

The 30-year-old designer, who had also created ensembles for Lady Gaga, was brought in to work with Rihanna on her 2011 Loud Tour by his boyfriend and Rihanna's stylist, Mel Ottenberg.

"I am so particular and hands on with everything I do, and that can be difficult, but with Adam, it never is. Oftentimes, I describe what I'm thinking for my show or my collection, and his execution is exactly what I wanted," commented Rihanna on her working relationship with Selman.

Meanwhile, the Barbados-born singer drove the audience wild as she performed all her top hits, including Talk That Talk, Rude Boy, We Found Love, Only Girl, Don't Stop the Music, and Where Have You Been.

After the show, an overwhelmed Rihanna expressed her appreciation to fans for a sold-out concert, tweeting, "No words, just DIAMONDS!!! #EPICshit #BUFFALO $old out!!!"

She even added, "#BUFFALO I will never forget how you made me feel tonight!!! Thank you from the bottom of my heart!! #1Love always."

If everything goes as planned, the tour will hit all major US cities and make its way into Canada before the ultimate climax at the Barclays Center in Brooklyn on May 5.

Way to go, RiRi!

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