Business Matters is a daily column that offers insight, analysis and opinion on the day's news.

-- Expectations for Warner Music Group's fiscal Q4, according to Thomson Reuters, is a 2% drop in revenue (to $836 million) and a 50% increase in earnings per share (to 6 cents, excluding extraordinary items). WMG will release earnings tomorrow morning, and its earnings call is at 8:30am ET. (Financial Times)

-- Robbie Williams is reportedly courting non-traditional investors as well as entertaining deals with traditional record labels. Williams is nearing the end of his four-album, £80 million ($134 million) multi-rights deal with EMI. He certainly has options, and this would be a good test of an artist's resolve. Superstar artists have had other options for years, but most choose to stay with traditional label deals. If a superstar artist like Williams is comfortable with the ability of his team to perform functions that are typically the domain of record labels, he might as well take investors' money and see how independence works out for him. Regardless of the outcome, it would be an instructive lesson for the entire industry. (Reuters)

-- Pop-up stores are all the rage this year. The Flaming Lips (in Los Angeles, for one day) and Third Man Records (in New York, Los Angeles and London) have done them. Companies of all stripes are doing them. And HMV, Britian's biggest entertainment retailer, has launched ten pop-up stores in the U.K. While pop-up stores got going a few years ago as a way to gain attention for a new product or test new ideas, HMV is launching the stores to help it cover increased holiday demand (seasonal demand for a product is a main driver of pop-up shops). Some of the short-lived HMV retail sites are in towns that currently lack an entertainment store. (Ad Age)

-- Numerous major copyright owners signed a letter to Congressional leaders in support of the Anti-Counterfeiting Trade Agreement. The RIAA, ASCAP, BMI, Universal Music Group, Warner Music Group, American Association of Independent Music (A2IM) and National Music Publishers Association (NMPA) are among the signatories. "Online theft is a critical challenge for each of the diverse copyright-based sectors represented by the signatories to this letter," it readers. "In this regard, it is essential that ACTA include a robust Internet chapter that, among other things, provides legal incentives for cross-industry cooperation to combat online piracy." (Copyrights & Campaigns)

-- With the launch of apps for phones that run the Symbian operating system, Spotify Mobile is now available on millions of additional phones. Symbian is used on the smartphones of Nokia, Sony Ericsson and Samsung. Go here for a list of Symbian devices that will run Spotify Mobile. (Spotify blog)

-- In a concise yet spirited editorial, the Guardian calls Britain's new digital economy bill "narrow in vision but dangerously broad" and argues it caves to the fears of media companies desperate to protect their 20th century business models. (The Guardian)

-- Topspin has hired Andrew Mains as its VP Artist Relations and Services. Mains was formerly head of new media at Interscope Records and had been consulting with Topspin for more than a year. (Topspin blog)

-- Universal Music Group’s Fontana Distribution has signed a sync licensing agreement with Downtown Music Services. (Press release)

Follow Billboard senior analyst Glenn Peoples on Twitter at twitter.com/billboardglenn.