Margaret's second single "Tell Me How Are Ya" was released in July 2013 on her first extended play (EP) "All I Need", which reached number 50 on the Polish albums chart. She represented Poland at the July 2013 Baltic Song Contest in Sweden, in which she sang "Thank You Very Much" and an EP cut "I Get Along", and finished second out of ten competitors. Margaret was nominated in several categories at the 2013 Eska Music Awards, including Best Female Artist, Best Debut, Best Hit and Best Music Video (both for "Thank You Very Much"), and won the latter. She was also nominated for Best Polish Act at the 2013 MTV Europe Music Awards. In December 2013, Margaret embarked on a promotional tour in Italy, where "Thank You Very Much" peaked at number 22 on Italy's official singles chart. In January 2014, Margaret released "Wasted" as the lead single from her first studio album "Add the Blonde". The song reached number six in Poland. In February, she became a spokesperson for Play, a Polish telecoms provider. "Add the Blonde" was released in August 2014. It is a pop record that was influenced by retro-disco and ska, and by the work of Madonna. The album reached number eight in Poland and was certified platinum by the Polish Society of the Phonographic Industry (ZPAV). The same month, Margaret released "Start a Fire", which was the official song of the 2014 FIVB Volleyball Men's World Championship in Poland. She performed it at the tournament's opening ceremony. The song also became the second single from "Add the Blonde" and peaked at number 10 in Poland. Around this time, she recorded a cover of Katarzyna Sobczyk's song "O mnie się nie martw" ("Don't You Worry About Me"), which was used as the theme song of the Polish television series of the same name. Margaret was featured on a 2014 Christmas charity album called "Siemacha po kolędzie" ("Siemacha After Carolling"), which was recorded in support of the Siemacha Association; its follow-up "Gwiazdy po kolędzie" ("Stars After Carolling") includes two songs recorded by Margaret and was released in 2015. The third single from "Add the Blonde", "Heartbeat", was released in February 2015 and charted at number 11 in Poland. In August 2015, Margaret won two Eska Music Awards for Best Female Artist and Best Artist on the Internet.