The First Lady's clothing isn't the only thing about her appearance being scrutinized -- her eyebrows are, too. As we reported yesterday, Michelle Obama's expertly groomed, highly-arched brows were the focus of a 700-word article in the Chicago Tribune this week. Of course, she's not the first celebrity whose brows have sparked conversation.

5 Famous Sets of Eyebrows

    "The angularity of Obama's brows was lending a look of intensity that some pundits, such as Bill O'Reilly, construed as anger or severity on the campaign trail," wrote Wendy Donahue in this week's Chicago Tribune. Donahue and others have noted a softer shape to Obama's eyebrows in recent weeks -- perhaps a response to that criticism.

    Getty Images

    Liz Taylor's lush brows were always expertly tweezed and trimmed, and at the time, her low arch and tapered line was considered the height of glamor. To get a similar look, use an eyebrow pencil to create a rounded, square shape at the beginning of the brow, (very) slightly overdraw your own natural line, and extend the ends with tiny strokes by a centimeter or two.

    Getty Images

    "High School Musical" star Zac Efron's bushy eyebrows are always stringently maintained, likely inspiring other men to learn how to use a new tool: the tweezers. Still, not everyone appreciates his hirsute look. (There's even a Facebook group called "Zac Efron's Eyebrows Are Disturbing.")

    Getty Images

    Burlesque star Dita von Teese's eyebrows are as theatrically vintage as the rest of her pin-up girl accoutrements. The siren is never seen with a hair out of place. And really, only a perfectionist could consistently achieve her movie-screen-perfect brows.

    Getty Images

    Brooke Shields' eyebrows have become almost as famous as the actress. When the future Calvin Klein model became a young star in the 1980s, her wildly untamed brows helped sparked the thick, bold look that became de rigeur during the decade, and propelled her to icon status.

    Getty Images