Police detained Kyadondo East MP Robert Kyagulanyi on Monday after shutting down his Kyarenga concert.
"He has been arrested in Busabala, where he was to address the media on the cancellation of his concert by the Police," Kyagulanyi's wife Barbie Itungo Kyagulanyi told AFP.
Police spokesman Fred Enanga confirmed that officers "engaged him earlier and drove him away from Busabala" but would not say if he was formally arrested.
Kyagulanyi also known by his stage name Bobi Wine, was scheduled to perform on Easter Monday but the show was cancelled by the Police on Sunday.
His attempt to reach the venue on the shores of Lake Victoria, flanked by dozens of supporters, was blocked by the Police who fired tear gas and water cannon at his convoy.
Before being detained, Bobi Wine posted on Twitter that the Police were trying to tow the singer's car away.
"People teargassed, beaten, Many arrested. We shall overcome...Stand firm," he wrote.
Later, a post on his Twitter account signed "admin" said the singer had been "violently arrested".
Police said the concert was cancelled because inadequate safety measures were put in place.