Magnolia City Mixtape’s favorite Knowles sister, the much-maligned Solange, performed a charming Mother’s Day song, “Mama Loves Baby” on the kickass kids’ show Yo Gabba Gabba! last week. Solange has a five-year-old son, and awesome taste in eye shadow. Joe Mathlete’s Marmaduke Explained series was mentioned mentioned on The Onion’s…