"Mack" Singer Morrison Begins Prison Term

May 15 [7:55 EST] -- On Wednesday British soul singer Mark Morrison, whose single "Return of the Mack" is number three on this week's U.S. pop chart, was taken to a London prison called Wormwood Scrubs.

The 24-year-old Morrison, began serving a three-month jail term for possessing a stun gun.

London police say he attacked officers on a street last October with the gun, and then ran off shouting "I'm Mark Morrison!"

Morrison says he only pulled the 23,000 volt stun gun to throw it away, and that police mistook him for a robber, handcuffed him, and beat him. The singer says he bought the stun gun in America "for protection," and did not know it was illegal in the U.K.

Morrison likes to call himself "the baddest boy in pop," but in court Wednesday morning he claimed to have a good character and a commitment to charity. However, prosecutors noted his "horrendous record of public order offenses." Just last month, Morrison was fined the equivalent of $1,100

for threatening someone he thought had kicked his car.