Sounds like Madonna's Instagram account is a little too risque.
According to Billboard, the 54-year-old singer has received a warning from the company to adhere to its community guidelines, which ban photos that show "nudity" or "mature content".
In the letter, the site -- owned by Facebook -- lets Madonna know that she shouldn't share photos that are not hers or pictures of illegal content.
"We value these guidelines, and believe that they will help keep Instagram a safe & fun place for everyone," the note reads. "It is important to note that continuing to violate them may result in a disabled account, or discontinued access to Instagram, without warning."
Madonna, who joined Instagram earlier this month, has posted snaps of her cleavage and behind, as well as pictures of Mexican artist Frida Kahlo, which could all be considered illegal or "mature."
The Queen of Pop currently has 156,942 followers.
Madonna, "The Virgin Tour", June 1985
Madonna performs at Live Aid, July 1985
Madonna on the cover of Playboy, 1985
Madonna performing in Paris, Aug. 1987
Madonna performs during her 'Girlie Show' in Bercy Omnisport Palace in Paris, Sept. 1993
Madonna on her "Blonde Ambition" tour, April 1990
Madonna blows the crowd a kiss after receiving the award for Best Female Video 07 September during the 1995 MTV Video Music Awards, Sept. 1995
1996 VH1 Vogue Fashion Awards
Madonna at Vogue Fashion Awards, Jan. 1998
Madonna, "Ray of Light" video, Sept. 1998
41st Annual Grammy Awards, Feb. 1999
Performing at 2000 MTV Europe Music Awards
Madonna, 'Drowned World Tour', July 2001
2003 MTV Video Music Awards -- The kiss that rocked the world.
Madonna, April 2003
Madonna reads from her new children's book "Mr. Peabody's Apples", Dec. 2003
Madonna's "Re-Invention" Tour, May 2004
U.K. leg of Madonna's "Re-Invention" Tour, Aug. 2004
Madonna performs at Live 8 London, July 2005
Madonna and her then-husband, Guy Richie, at the TIFF Gala Premiere of his film "Revolver", Sept. 2005
Premiere Of Madonna's Documentary "I'm Going To Tell", Oct. 2005
Awards Room at 2005 MTV Europe Music Awards, Nov. 2005
Madonna plays G-A-Y at Astoria, Nov. 2005
48th Annual Grammy Awards, Feb. 2006
Madonna plays Wembley Arena during her "Confessions" world tour, Aug. 2006
Madonna performs in Germany in the European leg of her "Confessions" world tour, Aug. 2006
Live Earth London, July 2007
"I Am Because We Are" Premiere at Cannes, May 2008
Madonna performs at Dodger Stadium, with a special appearance from Britney Spears, Nov. 2008
Madonna with daughter Lourdes at the New York premiere of "NINE", Dec. 2009
Madonna holds hands with her adopted daughter Mercy James as she arrives at the 'Raising Malawi Academy for Girls' in Chinkhota, Malawi, April 2010
Macy's "Material Girl" Collection Launch with daughter Lourdes and "Material Girl" model Taylor Momsen, Sept. 2010
2011 Vanity Fair Oscar Party with daughter Lourdes, Feb. 2011
Madonna attends the 'Alexander McQueen: Savage Beauty' Costume Institute Gala at The Metropolitan Museum of Art on May 2, 2011.