In today’s “Isn’t that ironic?” news, Forever21 has threatened to sue Rachel Kane, the blogger behind WTForever21, saying that the site constitutes “trademark infringement, copyright infringement, unfair competition and dilution.”

Yes, the same Forever21 that often finds themselves on the receiving end of accusations of trademark infringement, copyright infringement and really blatant designer knockoffs.

If you see a flash of red on the bottom of a woman’s shoe, your first thought might be that those shoes are by Christian Louboutin. That’s certainly what Christian Louboutin thinks your first thought will be, because they recently filed a lawsuit against Yves Saint Laurent in Manhattan which claims that “Defendants use of red footwear outsoles that are virtually identical to plaintiff’s Red Sole Mark,” and that the shoes “is likely to cause and is causing confusion, mistake and deception among the relevant purchasing public as to the origin of the infringing footwear.”

Late last week, Erin Kleinberg, Stephanie Mark and Jake Rosenberg launched a new fashion blog. The design was solid, the content striking and the concept – a peek inside the closets of fashion editors and insiders – met with enthusiasm. The name, however, was met with raised eyebrows. The Coveted is a fashion blog that focuses on Jennine Jacob’s personal style. Over the years, it’s been hosted on a blogspot URL, thecoveted.net and currently resides at the-coveted.com.

As of last week, The Coveted is also the aforementioned newly launched fashion blog, which resides at thecoveted.com.

Every major fashion brand is familiar with brand infringement online. While The Coveted confusion marks the first case we’ve seen in media, it’s hardly the only recent example of brands colliding over the rights to a web name.

Facebook already owns the trademark for their name, but for many outsiders their legal department is getting a bit too aggressive in defending it.