We've all been there: in front of a mirror, bored with our hair/noses/eyebrow arches, and desperate to make a change, any change. Sometimes those difficult times yield genius, like when Katie Holmes copied Suri's adorable banged bob and made us weep with envy. Sometimes, change for the sake of change is a bad thing -- like, say, the frizzy, unmanageable disaster that would've happened if we'd rashly copied Katie's awesome coif on ourselves.

But not all celebrities scratch the makeover itch as well as Katie did. Now that the fall TV season has started in earnest, we can finally ogle the stars who spent their off-time overhauling their looks for the better ... and which ones still desperately need a hiatus week to fix what they broke during their summer vacations.

THE GOOD:

TYRA BANKS: The buzz around Tyra has been that she's lost 20 lbs. That may be true, but we always think her body looks banging regardless of weight. (She's annoying like that.) We would, however, like to give Miss Tyra a high-five for her new, darker hair. After suffering through cycles of Top Model in which (a) she spent 13 episodes wearing a Bret Michaels-style bandanna, (b) her wig was consistently crooked, (c) her hair had a strange yellow stripe, or (d) her weave was teased up higher than a girl's bangs in 1985, it's refreshing to turn on ANTM and think, Damn, Tyra looks HOT.

JASON SEGEL: On "How I Met Your Mother," the adorable Jason Segel character, Marshall Eriksen, is a devoted husband with a Loch Ness monster obsession, self-professed "punter's calves" and a passion for cheese. We'd date him, if he weren't already married (and, you know, fictional). But our love for him was almost destroyed last year, thanks to the fact that he spent much of the season walking around looking like he'd lost a duel with a low-flow showerhead. His hair was wretched: flat, greasy, and too long. We were bereft. Until he turned up this season with a haircut. Whoever held that intervention, we thank you, and owe you a wheel of cheese of your very own.

ELLEN POMPEO and CHYLER LEIGH: OK, most of Pompeo's off-season work involved gestating, since she just had a baby. But for someone whose extreme thinness was highly publicized and engendered a great deal of concern from sandwich-loving bloggers, we've been thrilled to see the episodes of "Grey's Anatomy" in which she is hiding her baby bump. Why? Because she looks fantastic with a spoonful of extra meat on her bones -- as does co-star Chyler Leigh, who gave birth in May and does not appear to be in a huge rush to starve off the last 5 lbs. of her pregnancy weight. Granted, both women are genetically blessed, but still -- we hope Chyler's rational attitude rubs off on Ellen now that her baby is on the outside. There's an old saying that, as you age, you have to choose between your face and your bum; while no one in their right mind would say that these woman have big butts, both look about five years younger than they did pre-pregnancy. Babies: the cutest beauty product in town.

THE BAD:

KELLY OSBOURNE: Kelly Osbourne is so cute. We're thrilled that she isn't letting the Spray Tan Nazis at "Dancing With the Stars" bronze her the color of burnished oak. That said, when we caught a glimpse of her on the premiere of DWTS, we found ourselves wondering who the little old lady was. Blame the platinum bowl cut, a hairdo last seen on Josie Bissett back when she was the most boring denizen of Melrose Place, and also on our grandma. True, Granny works it, but she's 85 years old. Kelly is young and vibrant and deserves a 'do that doesn't wash out that porcelain skin. We never thought we'd say this, but we preferred Kelly's pink hair; even the crazy wigs the "Dancing With the Stars" gurus have been outfitting her with lately have been an improvement.

BETHANY JOY GALEOTTI: Unlike her "One Tree Hill" co-star Sophia Bush, we rarely see Bethany Joy out and about, so we're always in for a surprise when we turn on each season's premiere episode. Bethany's been riding high the last few years with lovely soft waves in a rich dark brown, and a wardrobe of cute professional-looking dresses. So you can imagine our horror that this season, her hair is suddenly an awkward brassy red-brown and prone to bizarre patches of frizz, while the wardrobe department puts her in saggy strapless sailor dresses. This is deeply unfair. How can her character Haley cope with her husband's love-child blackmail scandal if she looks like she caught a mild case of homelessness? We don't know if perhaps Bethany took a cue from her show and, say, recently arranged for her hairdresser's new heart to be fed to a dog, but we suggest she attempt to make amends. Or go wig-shopping.

THE UGLY:

TAYLOR MOMSEN: It was probably wishful thinking on our parts to hope that Taylor Momsen suddenly would abandon the Young Punk in $1,500 Boots look she's been sporting for what feels like the last five years. She's committed to the point of codependency to the twin gods of black eyeliner and ripped tights. Ironically, her "Gossip Girl" character, Jenny Humphrey -- prone to a similar look last season -- has endured several snide comments about said makeup from other characters, one of whom told her she looked like one of "The Incredibles." But while Little J has since eased up on the face paint, Taylor went the opposite direction, despite the fact that she was given a line in a recent episode where she actually told another character to wash off her heavy makeup -- makeup EXACTLY LIKE what Taylor sports in real life. Honey, how much more direct do you want people to get with you? THE RACCOON EYES ARE NOT WORKING. You are 16; your Courtney Love phase can wait a decade. We promise.


Read more from Heather and Jessica on Lemondrop or at their wildly popular site, GoFugYourself.