Cab I get a beautiful and wide "Jessica Alba " smile at all? And if yes then how ? (photos)

In my opinion, and based off the one photo you posted, you DO have a wide smile already you just have small teeth.  Veneers can fill in the smile and brighten the smile.  you should consider 10 porcelain veneers on the upper teeth with an option of placing veneers on the lower front teeth as well if they show when smiling.Lip enhancements and any other facial enhancements should be considered after final placement of the veneers.

yes, You can get a wide beautiful smile. But I am not getting the meaning of your statement "temporary braces" Please explain what is that. I do not know anything about 'temporary braces'.
Your posted photo quality is not good, so it's my request to upload good quality smiling photo from the front. Meanwhile, you can read about the 'large buccal corridor' online.

The DNA Appliance was invented by Dr David Singh and it can orthopedically grow your maxilla as an adult to gie you a bigger wider healthier looking smile. The SARPE procedure can also widen you maxilla but involves a surgical procedure.I strongly suggest patients who want full wide healthy smiles to consider the DNA Appliance and Epigenetic Orthodontics.Ira L Shapira DDS, D,ABDSM, D,AAPM, FICCMOThinkBetterLife.com