The star of the album is undoubtedly international hip-hop sensation Akon, who Shah Rukh Khan has roped in to do two numbers on the album. The first of the two, chammak challo, has already proved to be a monster hit, having been inadvertently leaked onto the internet a few months ago. Though the novelty of the track does come from the fact that it features Akon singing in perfect Hindi (the rapper was coached phonetically by music directors Vishal and Shekhar),... However, the scene stealer on the RA.One soundtrack might just be the brilliant Shafqat Amanat Ali, who's on vocals on the superbly mellifluous dildaara.  Vishal-Shekhar have a trick up their sleeves here too, with the track being a remake, a Hindi cover, perhaps, of the Ben E. King, Leiber-Stoller classic, "Stand By Me".  However, it is to the duo's great credit that V-S manage to give a tune as iconic as this their own touch, turning it into a truly soulful Hindi, Sufiana number.  Combining Shafqat Amanat Ali with Clinton Cerejo's choir is an inspired touch from the music directors, who themselves strike a singing cameo, with Vishal Dadlani's additional vocals of the song's original lyrics forming a perfect contrast to Kumaar's beautiful Hindi verses. Repeat value, thy name is dildaara. RA.One is a work of superb breadth from Vishal-Shekhar, who are out to redefine their sound here. Of course, the fact that they have a musical superhero like Akon in their corner helps them along, but even without it, in tracks like dildaara, bhare naina and raftaarein, the duo seem to gone above and beyond the call of duty.  Akon's chammak challo is undoubtedly going to be the biggest hit of the year, but with the RA.One soundtrack, Vishal-Shekhar prove that they have so much more to offer. This is simply superb stuff!..... On the whole the album is worth buying and offers some interesting and entertaining tracks. ... --movietalkies.com