Lost (track)
by Katy Perry
Lost appears on the following album(s) by Katy Perry:
- One Of The Boys (track #9) (this album) (2008)
- MTV Unplugged (track #5) (2009)
Upcoming concerts
Listen to Lost on YouTube
Lost ratings
Average Rating = (n ÷ (n + m)) × av + (m ÷ (n + m)) × AVwhere:
av = trimmed mean average rating an item has currently received.
n = number of ratings an item has currently received.
m = minimum number of ratings required for an item to appear in a 'top-rated' chart (currently 10).
AV = the site mean average rating.
| Rating | Date updated | Member | Track ratings | Avg. track rating |
|---|---|---|---|---|
| 11/27/2025 21:20 | Exist-en-ciel | 79,162 | 70/100 | |
| 08/12/2023 23:06 | culwin | 20,568 | 75/100 | |
| 04/22/2023 15:03 | pinkfreud1981 | 3,579 | 71/100 | |
| 03/05/2023 23:25 | alexandermause | 15,347 | 85/100 | |
| 07/21/2022 20:52 |  paladisiac | 82,696 | 64/100 |
Rating metrics:
Outliers can be removed when calculating a mean average to dampen the effects of ratings outside the normal distribution. This figure is provided as the trimmed mean. A high standard deviation can be legitimate, but can sometimes indicate 'gaming' is occurring. Consider a simplified example* of an item receiving ratings of 100, 50, & 0. The mean average rating would be 50. However, ratings of 55, 50 & 45 could also result in the same average. The second average might be more trusted because there is more consensus around a particular rating (a lower deviation).
(*In practice, some tracks can have several thousand ratings)
This track has a Bayesian average rating of 67.0/100, a mean average of 61.3/100, and a trimmed mean (excluding outliers) of 63.5/100. The standard deviation for this track is 18.6.
Lost comments
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