Source : Webster's Revised Unabridged Dictionary (1913)

Tawdrily \Taw"dri*ly\, adv.
   In a tawdry manner.

Source : WordNet®

tawdrily
     adv : in a tastelessly garish manner; "the temple was garishly
           decorated with bright plastic flowers" [syn: {garishly},
            {gaudily}]