Lovato 's second studio album , '' Here We Go Again '' , was released on July 21 , 2009 ; she described its acoustic style as similar to that of John Mayer . The album received favorable reviews from critics who appreciated its enjoyable pop-rock elements , echoing reviews of '' Do n't Forget '' . Lovato 's first number-one album , it debuted atop the '' Billboard '' 200 with first-week sales of 108,000 copies , and was later certified Gold . The album 's lead single and title track , " Here We Go Again " , debuted at number 59 on the '' Billboard '' Hot 100 , and managed to peak at number 15 , becoming Lovato 's highest peaking solo single at the time . The song also peaked at number 68 on the Canadian Hot 100 and number 38 in New Zealand . " Here We Go Again " was additionally certified Platinum in the US . The album 's second and final single , " Remember December " failed to match the success of its predecessor , but peaked at number 80 on the UK Singles Chart . Lovato made her first 40-city national concert tour , Live in Concert , in support of '' Here We Go Again '' . The tour , from June 21 to August 21 , 2009 , had David Archuleta , KSM and Jordan Pruitt as opening acts . Lovato and Archuleta received the Choice Music Tour award at the 2009 Teen Choice Awards . In 2010 , Lovato and Joe Jonas recorded " Make a Wave " as the second charity single for Disney 's Friends for Change . In May of that year , Lovato guest-starred as a teenage schizophrenic Hayley May in the sixth-season '' Grey 's Anatomy '' episode , " Shiny Happy People " . Although critics praised her versatility , they were underwhelmed by her acting and felt that her appearance was designed primarily to attract viewers . Later that year , she headlined her first international tour , the South American Tour , and joined the Jonas Brothers : Live in Concert tour as a guest
2009 Teen Choice Awards
2009 Teen Choice Awards
Demi Lovato