Question: In which countries did the single Part of Me debut at number one on the "Billboard" hot 100?
About the article "Part of Me (Katy Perry song)", section "Abstract".

Candidate passages:
The lead single "I Just Can't Stop Loving You" became the first of five of the album's singles to reach number one on the "Billboard" Hot 100.
The song reached number one on September 19, 1987, and also charted on "Billboard"s R&B/Hip Hop Songs chart and the Adult Contemporary chart, peaking at number one and number two respectively.
Internationally, the song also peaked at number one, in three territories, United Kingdom, for two weeks, and nine weeks in both Norway and New Zealand.
The album's second single, "Bad", peaked at number one on the "Billboard" Hot 100 on October 16, 1987.
The song topped the Spanish charts, as well as charting within the top-ten internationally.
"The Way You Make Me Feel" became the album's third consecutive single to peak at number one on "Billboard"s Hot 100.
The song primarily charted within the top ten and twenty internationally.
"Man in the Mirror" charted at number one on "Billboard"s Hot 100, and charted at number four, eight, and ten in New Zealand, Australia, and Austria.
On July 2, 1988, "Dirty Diana" became the fifth consecutive, and final, single to peak at number one on the Hot 100.
"Dirty Diana" was successful internationally, charting within the top ten in eight territories.
"Another Part of Me" charted at number eleven on the "Billboard" Hot 100, while topping the "Billboard" R&B/Hip Hop Songs chart.
Internationally, "Another Part Of Me" was a mid success compared to its previous singles, peaking at number five, fourteen and thirty two in the Netherlands, New Zealand and France.
"Smooth Criminal" became the sixth top ten single on the "Billboard" 100, and saw similar success internationally, charting within the top ten in five territories, and within the top forty in all its international countries.
Released outside the United States and Canada, "Leave Me Alone" topped the Spanish charts, as well as peaking within the top ten in five other countries.
The album's last official single was "Liberian Girl", which did not chart on the "Billboard" Hot 100, but was generally successful internationally, charting mainly within the top twenty.
The singles success of Bad was extremely successful in the UK, where seven of the singles from the album all reached the UK top ten by 2009 (six initially, until Man in the Mirror jumped from position 21 to 2 in 2009), just like Dangerous achieved in 1991-1993.
This was a record for any studio album in the UK until Calvin Harris broke this in 2013. 
"The Things We Did Last Summer" was released in September 1962.
One month after its release the album charted at #121 on the Billboard 200 Chart.
The first single taken from "The Things We Did Last Summer" was "Johnny Loves Me".
The song was released a few months ahead of the album and was the follow-up single to her previous hit "Johnny Angel" from her debut album "Shelley!".
"Johnny Loves Me" charted on the Billboard Hot 100 pop chart at #21 in July 1962.
The second single taken from the album was "The Things We Did Last Summer" which peaked at #46 on the Billboard Hot 100. 
The single entered the "Billboard" Hot R&B/Hip-Hop Songs chart at number 72 and has climbed as high as number 30.
The single entered the "Billboard" Hot 100 at number 79 on the issue date of April 12, 2008 and dropped to 87 the following week and 98 for the last week making its chart position not very impressive for the group's debut single.
"Got Me Going" did not live up to the success of Danity Kanes' first single "Show Stopper" which peaked at number 8 on the Billboard Hot 100. 
Due to the hype around "Watch the Throne", "Who Gon Stop Me" debuted on the "Billboard" Hot 100 at 44, without actually being released as a single.
The reason for the song's relatively high debut on the Billboard Hot 100 is because of the song's high digital performance.
On the week of August 27, 2011, "Who Gon Stop Me" debuted on the Billboard digital songs chart at number 19 which was the second highest debut of the week only under Drake's single "Headlines".
In its second week on the Hot 100 it dropped to 79, and by the third week it exited the chart entirely.
The song is the only non-single from "Watch the Throne" that managed to chart in the Top 50 on the Billboard Hot 100.
The song performed similarly in Canada, debuting at 60 on the Canadian Hot 100 the week of the album's release. 
"Strip Me" made its US "Billboard" Hot 100 chart debut at number ninety-five on 6 November 2010, where it remained for just one week.
However in the week following the release of her album of the same name, "Strip Me" re-entered the Hot 100 at a new peak of ninety-one.
To date, it is Bedingfield's least successful single, not including "Touch" (May 2010) which failed to chart on the "Billboard" Hot 100.
However, the song was more successful on the Adult Pop Songs radio format where it has so far logged eight weeks on the chart and peaked at number twenty-three.