Why do we say she's a "fangirl"? Besides being a hardcore Trekker and comic book fan, Rosario is also the creator /co-writer of the comic book Occult Crimes TaskForce (the lead character Sophia Ortiz is illustrated in her image).
As for being a "fanboy dream goddess"...if you've seen Sin City, GrindHouse, or even Adventures of Pluto Nash (She and Pam Grier are the ONLY reasons to bother with that turkey!) you wouldn't be wondering about the designation...
Rosario is one of the more civic-minded performers in show-biz, devoting her time and her name to a wide variety of causes including voter registration, gay rights, preventing domestic violence, and conservation. Very cool!
She co-starred with Tracie Thoms twice, in Rent (where she & Tracie were the only lead performers not from the Broadway version) and GrindHouse presents: Quentin Tarantino's Death Proof / GrindHouse "Death Proof".
Rosario performs her own singing in every film her on-screen persona sings in (Rent, Josie & the Pussycats, and Adventures of Pluto Nash) and she's on the soundtrack albums of all of them!
Fire with Fire (Talia Durham)
UnStoppable (Connie Hooper)
Percy Jackson and the Olympians: the Lightning Thief (Persephone)
Haunted World of El SuperBeasto (Velvet Von Black)
Wonder Woman  (Artemis)
Gemini Division [webisodes] (Anna Diaz, producer)
Eagle Eye (Zoe Perez)
Grindhouse Presents: Quentin Tarantino's Death Proof / Grind House "Death Proof" (Abernathy)
Clerks II (Becky)
Devil's Rejects [edited from film, scenes on DVD version] (Nurse Marcia)
Sin City / Sin City: a Dame to Kill For (Gail)
Adventures of Pluto Nash (Dina Lake / performer: "It's Alright")
Men in Black II (Laura Vasquez)
Josie & the Pussycats (Valerie Brown / performer on all "Pussycats" songs)
Rosario's Official WebSite
Sassy: THE fan source for Rosario Dawson
Rosario Dawson Shrine