 The episode features mash @-@ up covers of " It 's My Life " by Bon Jovi and " Confessions Part II " by Usher , and " Halo " by Beyoncé Knowles and " Walking on Sunshine " by Katrina and the Waves . Both tracks were released as singles , available for digital download . " It 's My Life / Confessions Part II " charted at number 7 in Ireland , 14 in the UK , 22 in Australia , 25 in Canada and 30 in America , while " Halo / Walking on Sunshine " charted at number 4 in Ireland , 9 in the UK , 10 in Australia , 28 in Canada and 40 in America . Michele has revealed that she practiced talking " manically " for several days in order to convey the effects of pseudoephedrine on Rachel . In order to portray the character in her altered state , she questioned : " How manic is the right amount of manic ? What would Rachel be like on uppers ? What would she sound like ? " She deemed performing the mash @-@ up piece in that state " so much fun " . 
 The episode <a href='uninflect' title='1'><mark>features</mark></a> mash @-@ up covers of " It 's My Life " by Bon Jovi and " Confessions Part II " by Usher , and " Halo " by Beyoncé Knowles and " Walking on Sunshine " by Katrina and the Waves . Both tracks <a href='uninflect' title='2'><mark>were</mark></a> released as singles , available for digital download . " It 's My Life / Confessions Part II " charted at number 7 in Ireland , 14 in the UK , 22 in Australia , 25 in Canada and 30 in America , while " Halo / Walking on Sunshine " charted at number 4 in Ireland , 9 in the UK , 10 in Australia , 28 in Canada and 40 in America . Michele <a href='been_done' title='3'><mark>has</mark></a> revealed that she practiced talking " manically " for several days in order to convey the effects of pseudoephedrine on Rachel . In order to portray the character in her altered state , she questioned : " How manic is the right amount of manic ? What would Rachel be like on uppers ? What would she sound like ? " She deemed performing the mash @-@ up piece in that state " so much fun " . 
The episode feature mash @-@ up covers of " It 's My Life " by Bon Jovi and " Confessions Part II " by Usher , and " Halo " by Beyoncé Knowles and " Walking on Sunshine " by Katrina and da Waves . Both tracks was released as singles , available for digital download . " It 's My Life / Confessions Part II " charted at number 7 in Ireland , 14 in tdaUK , 22 in Australia , 25 in Canada and 30 in America , while " Halo / Walking on Sunshine " charted at number 4 in Ireland , 9 in the UK , 10 in Australia , 28 in Canada and 40 in America . Michele done revealed that she practiced tlkin " manically " fir several days in order to convey the effects of pseudoephedrine on Rachel . In order to portray thdaharacter in her altered state , she questioned : " How manic is thedaght amount of manic ? What would Rachel b like on uppers ? wat would she sound like ? " She deemed performing the mash @-@ up piece in that state " so much fun " .