Lady Gaga’s “ARTPop” album last fall certainly didn’t give Universal Music Group any pop.

Gaga’s fourth-quarter flop helped cut Universal’s revenue in the period 9.3 percent, the company said in a report Tuesday.

The tough Japanese economy — which accounts for 25 percent of global music sales — also hurt Earnings before interest, tax and amortization, or Ebita, was off 11.1 percent, or 7.8 percent on a constant-currency basis. The tough quarter cut profits for the year by 2.9 percent, to $702 million (511 million euros). They were up 1.4 percent on a constant-currency basis, the company said. Full-year revenue rose 7.5 percent to $6.7 billion (4,886 million euros) or 12.8 percent when adjusted for currencies. For the year, Universal Music’s best-selling albums were from EMI’s Katy Perry and Interscope’s Eminem. Read more…