Singer Anastacia has canceled her upcoming European tour after being diagnosed with breast cancer for the second time.

The 44-year-old Chicago-born pop star, best known for her 1999 smash, "I'm Outta Love," was scheduled to launch her upcoming tour in London on April 6, but has opted go cancel the tour instead, so that she may focus on fighting the disease.

"Anastacia has sadly been diagnosed with breast cancer for the second time after having successfully survived her 2003 battle with the disease. Consequently she has been forced to cancel all performances, tours and any travel from now until further notice," reads a post on her Facebook page

After revealing yesterday (Feb. 12) that she had to postpone four shows due to an injury on her hip, Lady Gaga has been forced to cancel the remainder of her Born This Way Ball world tour.

Gaga told fans she was "completely devastated" to postpone the shows, yesterday, after being diagnosed with synovitis, a severe inflammation of the joints. Sadly, it appears the entire remainder of her world tour, which ran until the end of March for a total of 21 more dates, will now have to be canceled, so that she may receive surgery on the injured hip.

"Live Nation Global Touring has confirmed that the remainder of the Lady Gaga Born This Way Ball performances have been cancelled," the tour's promoters explained in a statement.

Looks like Rihanna and Beyonce are going back and forth with their increasingly steamy magazine cover shoots.

With Beyonce's revealing GQ cover not yet even on newsstands, and Rihanna's basically naked GQ cover still on the shelves, Ri-Ri is back with seven (count 'em) special edition covers for Complex magazine.

READ THE FULL STORY AND CHECK OUT ALL OF RIHANNA'S COMPLEX COVERS AT THE BOOMBOX.

After photos of GQ's Beyonce-featuring February issue leaked online, the magazine has finally revealed the official cover, which was shot by photographer Terry Richardson.

Showing off her post-pregnancy body in a revealing cut-off top and extremely small zippered animal-print underwear, the 31-year-old singer is all curves and skin on the cover, which hails her as one of the 100 sexiest women of the 21st century.

The full spread will be revealed by GQ in its entirety on Jan. 15, with the issue hitting newsstands on Jan. 22.

READ THE FULL STORY AT THE BOOMBOX.

Young Money rapper Lil Twist was apparently behind the wheel of Justin Bieber's Ferrari yesterday (Jan. 1), when a paparazzo was struck by a motorist and killed.

The 19-year-old Lil Wayne protege was spotted with Bieber at the Four Seasons in Beverly Hills prior to the accident, and left in the singer's white Ferrari, without Bieber.

Unfortunately, Twist quickly caught the attention of California Highway Patrol, who pulled him over for speeding on the 405 freeway. Photographer Chris Guerra, who had been tailing the car, parked across the freeway, attempting to snap photos of Bieber, whom he allegedly believed to have been smoking marijuana in the car earlier.

READ THE FULL STORY ON THE BOOMBOX.

Nelly Furtado sits across from our Los Angeles AOL Sessions crew on a high stool, making bird noises.

The Victoria, British Columbia-born mother of two has just performed several songs from her her forthcoming fifth album, The Spirit Indestructible, and now she's waiting for our interview to begin, looking inordinately relaxed, dangling a heeled foot.

Though the studio sometimes intimidates artists, Furtado's poise powers us through the typically vibe-killing pre-interview moments before "camera speeds" is finally announced, sticks clack and the talent's exhausted scowl shifts to an immoderate Vaseline-toothed smile.

Nelly Furtado is currently preparing to release her fifth studio album The Spirit Indestructible in September, collaborating with hit-makers like Salaam Remi, Rodney "Darkchild" Jerkins and Bob Rock, and returning with a sound which she has compared to her 2000 debut, Whoa, Nelly!

As fans anxiously await her new release, the Canadian singer-songwriter stopped by AOL Music's Los Angeles studios to perform several songs from her forthcoming LP, including her hit single "Big Hoops (Bigger the Better)." After Nelly's rousing performance, AOL Music spoke with the singer -- who was both poised and hilarious -- about her experience volunteering in Africa, motherhood, and the responsibilities she deals with as a female artist.

Take a behind-the-scenes look at Nelly Furtado in the video below, and stay tuned for her Sessions performance premiere, right here on AOL Music!