Lena Meyer-Landrut (b. 1991), known simply as Lena, is a German singer, 2010 Eurovision Song Contest winner, and 2011 German Eurovision representative. Along with Ernie, she performed "Bert, oh Bert," a parody of her winning entry "Satellite." The 2011 video also features an appearance of Bert, and the first exclusive cameo appearance of The Martians on the country's co-production. Beginning with season 40 in 2013, Landrut provides the vocals for the updated version of the Sesamstrasse theme song.