Surely by now you've heard about Britney Spears' "Glee" appearance and how spectacular it was. At least, that's what some people thought. We, admittedly, didn't watch it. But we do know one thing about the show: It marked Britney's latest comeback. Just look at this Huffington Post headline: "Oh Baby, Baby: Britney Spears Makes a Comeback." There you have it.

It's really no surprise that people are touting the Britney-ified "Glee" as her comeback. This happens every single time the girl does something that's not remotely crazy. Seriously, if we counted every time Britney has made a comeback in the past decade we'd have to use both fingers and toes. See for yourself.

September 28, 2010: Britney's episode of "Glee" breaks the show's ratings records. So naturally, there's this headline: "Oh Baby, Baby: Britney Spears Makes a Comeback." [HuffingtonPost]

March 2, 2009: Britney starts a new tour in Louisiana and is declared "the comeback queen." [JustJared]

October 11, 2008: Britney gets naked in the video for her "comeback single," "Womanizer." [DailyMail]

September 11, 2008: According to some survey in the U.K., Britney's 2008 VMA performance is the "greatest comeback ever." [ONTD]

March 25, 2008: Britney and her brown hair appear on "How I Met Your Mother," which, according to ABC, "suggests a comeback." [ABC News]

October 29, 2007: Britney's "Blackout," universally hailed as her "comeback album," is released. [Sunday Times]

May 2, 2007: Britney's "comeback mini-tour" in San Diego. She's wearing a ratty wig and fake fur coat while lip-synching. [San Francisco Chronicle]

November 7, 2006: Britney and K-Fed get divorced, which some think is the "first step in Britney's comeback." [MSNBC]

September 20, 2006: Britney plans to get a tummy tuck as a part of her "post-baby comeback." [The Bosh]