Well, the photo has been re-touched, and she's probably got tonnes of shine spray on it to make it look healthy for the photo, not to mention all the lighting they use on a photoshoot like that - it's gonna look healthy and shiny.
Probably not the best example to go by really. It's better to focus on your own hair than aspiring to look like a picture that's not particularly realistic. A pic of your own hair would be more help, we could then give you some pointers on how to better manage your hair....
What spray do you use?
I use Lee Stafford heat protection.
I know its been touched etc because of the website, but that colour always seems to look healthy, even people at uni i've seen around. Maybe thats the only reason; the colour.
Yeah, new colouring of any kind tends to look healthier since there are chemicals that initially make the hair shinier and softer. My hair is normally so greasy it used to be greasy as soon as I dried my hair, but if you throughly wash your hair twice with an anti grease formulated shampoo or something like T-Gel, and finish with a weekly intensive conditioner treatment - it will do wonders for your hair. I have found that products seem to have the greatest bearing on condition - with heat protection and the proper products, my hair always seems healthy no matter how much I straighten it, whereas before it was always with greasy roots and dry ends even though I tried not to straighten it.