The detection of Flat Spectrum Radio Quasars (FSRQs) in the Very High Energy (VHE, E>100 GeV) range is challenging, mainly because of their steep soft spectra, which are likely sum of internal and external absorption. MAGIC has observed and detected all the three FSRQs known to be VHE emitters and found that they exhibit very different behavior. The 2010 discovery of PKS 1222+21 (z = 0.432), challenges simple one-zone emission models with the fast variability, requiring a more complicated scenario. 3C279, the most distant AGN (z= 0.536), which was discovered by MAGIC in 2006 and detected again in 2007, was more recently observed in 2011, first during a monitoring campaign and later observations were triggered by a flare detected with Fermi-LAT.
We present the MAGIC results and the multi-wavelength behavior during this flaring epoch. Finally, we report the 2012 detection of PKS 1510-089 (z = 0.36), together with its simultaneous multi-wavelength data covering radio, optical, X-rays and HE gamma-rays from Fermi-LAT. With the study of the spectral properties of these sources, we aim at identifying the physical processes responsible for their emission and at explaining their observed variability.