Question: Campbell Live included an interview with an American singer who sold how many albums since 2009?

Context paragraphs:
Mackie Osborne: Mackie Osborne is an artist responsible for the design and illustrations of many music albums since the 1980s.  She is a member of the band Fleabag and has contributed to many albums on packaging artwork, layout design and art direction.

Glen Campbell Live (1969 album): Glen Campbell Live is the fifteenth album by American singer/guitarist Glen Campbell, released in 1969 (see 1969 in music).  It features all of his hits up to that point, with the exceptions of the noticeably absent "Galveston" and "Wichita Lineman".

Nat Baldwin: Nat Baldwin (born February 21, 1980 in Portsmouth, New Hampshire) is an American bassist and singer.  He is best known for being a member of Dirty Projectors and has also released solo albums since 2003.  His most recent solo album is "In the Hollows" (2014).  He also appears on many albums such as "In Ear Park" (2008) by Department of Eagles, "Contra" (2010) by Vampire Weekend and "Shields" (2012) by Grizzly Bear.

Adam Lambert: Adam Mitchel Lambert (born January 29, 1982) is an American singer, songwriter and stage actor.  Since 2009, he has sold over 3 million albums and 5 million singles worldwide.

Campbell Live: Campbell Live was a half-hour-long New Zealand current affairs programme Monday–Friday at 7.00pm (following 3 News), on TV3 and was hosted by John Campbell.  "Campbell Live" has interviewed various notable personalities, including Al Gore, Robert Fisk, Tony Blair, as well as an array of celebrities, including Adam Lambert and Metallica.

Glen Campbell Live! His Greatest Hits: Glen Campbell Live!  His Greatest Hits is the fifty-fourth album by American singer/guitarist Glen Campbell, released in 1994 (see 1994 in music).

@Seven: At Seven, commonly stylised as @Seven, was a New Zealand comedy show where Petra Bagust and other comedians present the "real news" from the last 24 hours from New Zealand and the rest of the world.  The show replaced "Campbell Live", a New Zealand current-affairs program for the Summer Holidays in 2009/2010 whilst "Campbell Live" took a break. " @Seven" finished for the 2009/2010 summer holiday break on 22 January 2010 and was replaced with the normal TV3 7pm show, "Campbell Live". " @Seven" did not return the following summer break instead TV3 screened re-runs of "Modern Family".

Mariza Koch: Mariza Koch (Greek: Μαρίζα Κωχ ; born March 14, 1944) is a Greek folk music singer who has recorded many albums since starting her career in 1971.  On the wider stage she is best remembered for representing her homeland at the Eurovision Song Contest 1976 with the song Panayia Mou, Panayia Mou.  Mariza Koch was born in Athens in 1944 but lived in her mother's hometown in Santorini from a young age.  Her father was German.

John Campbell (broadcaster): John Campbell (born 10 February 1964) is a New Zealand journalist and radio personality.  He has presented "Checkpoint", Radio New Zealand's drive time show, since January 2016.  He was the presenter of "Campbell Live", a former 7 p.m. current affairs programme on TV3.  He was a rugby commentator for Sky Sports during the All Blacks' test Samoa in early 2015—a fixture he had vocally campaigned for while hosting "Campbell Live".

Glen Campbell Live (1981 album): Glen Campbell Live is the thirty-eighth live album by American singer/guitarist Glen Campbell, a UK only release from November 1981 (see 1981 in music).

Supporting paragraphs: Campbell Live Adam Lambert
Answer: over 3 million