Complex sentence: Despite negative reviews of "My Jeans", Swerdlow followed up with "O.M.G" in March 2011, and "Don't Give Up", dealing with "haters", in April 2011.
Split into simpler sentences: Despite negative reviews of "My Jeans", Swerdlow followed up with "O.M.G" in March 2011,. This and her other song, "Don't Give Up", were apparently created for dealing with "haters", in April 2011.